aleventhal@chromium.org janewman@microsoft.com chrome-a11y-core@google.com The amount of time accessibility was enabled and actively used. Reported when we switch states from active to inactive. mschillaci@google.com aldietz@google.com dtseng@google.com chrome-a11y-core@google.com Tracks the amount of time (in ms) that the accessibility engine was {CurrentState} before {CallType}. This is recorded either at the start of the onDisabled callback, or immediately before the call to reEnableRendererAccessibility. mschillaci@google.com aldietz@google.com dtseng@google.com chrome-a11y-core@google.com Tracks when the Auto-disable Accessibility feature changes the state of the accessibility engine by calling {MethodCall}. This is {CallType}. mschillaci@google.com chrome-a11y-core@google.com Tracks the maximum number of AccessibilityNodeInfo objects that were stored in the Java-side cache during a single session. mschillaci@google.com chrome-a11y-core@google.com Tracks the percentage of calls from the Android framework to create a new AccessibilityNodeInfo object that were serviced from the cache rather than constructing the object from scratch during a single session. mschillaci@google.com abigailbklein@google.com chrome-a11y-core@google.com Tracks the number of AccessibilityEvents dropped when the OnDemand accessibility services feature is enabled. Recorded at the end of a session. mschillaci@google.com abigailbklein@google.com chrome-a11y-core@google.com Tracks the number of AccessibilityEvents dropped when the OnDemand accessibility services feature is enabled, and when the total percentage of dropped events is 100%. Recorded at the end of a session. mschillaci@google.com abigailbklein@google.com chrome-a11y-core@google.com Tracks the number of AccessibilityEvents dropped when the OnDemand accessibility services feature is enabled, and the AccessibilityPerformanceFiltering feature is enabled, and the number of events dropped is 100%. Tracks for when the AXMode is set to {AXMode}. Recorded at the end of a session. Updated in M114 to add FormControls variant. mschillaci@google.com abigailbklein@google.com chrome-a11y-core@google.com Tracks the percentage of AccessibilityEvents dropped when the OnDemand accessibility services feature is enabled. Recorded at the end of a session. mschillaci@google.com abigailbklein@google.com chrome-a11y-core@google.com Tracks the percentage of AccessibilityEvents dropped when the OnDemand accessibility services feature is enabled, and the AccessibilityPerformanceFiltering feature is enabled. Tracks for when the AXMode is set to {AXMode}. Recorded at the end of a session. Updated in M114 to add FormControls variant. mschillaci@google.com aldietz@google.com chrome-a11y-core@google.com Tracks the enabled state for the Page Zoom option on the main app menu. The state will be one of the following enumerated states: 0) not enabled, 1) enabled explicitly by the user on the Accessibility Page Zoom setting, 2) enabled automatically if the user has an Android OS-wide default font size, 3) disabled explicitly by the user on the Accessibility Page Zoom setting. Recorded each time the app menu is opened. mschillaci@google.com aldietz@google.com chrome-a11y-core@google.com Tracks whether the user opened the Page Zoom slider from the app menu option. Recorded each time the slider is opened from the app menu. mschillaci@google.com aldietz@google.com chrome-a11y-core@google.com Tracks whether the user changed the individual page zoom level on at least one webpage from the app menu slider view. Recorded each time the slider is dismissed if the user changed the zoom level before dismissal. mschillaci@google.com aldietz@google.com chrome-a11y-core@google.com For users who changed the individual page zoom level on at least one webpage from the app menu slider view, tracks what zoom level has been set on the page. Recorded each time the slider is dismissed if the user changed the zoom level before dismissal. mschillaci@google.com aldietz@google.com chrome-a11y-core@google.com Tracks whether the user changed the default page zoom level from the Accessibility Page Zoom settings page. Recorded each time the user closes the Accessibility Page Zoom settings page if the user changed the zoom level while the settings page was showing. mschillaci@google.com aldietz@google.com chrome-a11y-core@google.com For users who changed the default page zoom level from the Accessibility Page Zoom settings page, tracks what default zoom level has been set in the settings. Recorded each time the user closes the Accessibility Page Zoom settings page if the user changed the zoom level while the settings page was showing. aleventhal@chromium.org chrome-a11y-core@google.com Tracks whether a screen reader is enabled on Android (e.g. Talkback). This is checked once, 45 seconds after startup. Note: prefer Accessibility.Android.ScreenReader.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} mschillaci@google.com chrome-a11y-core@google.com Tracks the total amount of time that this WebContents spent in the foreground for usages with the native accessibility engine always initialized. That is, this is a measure of time spent on the web for users that always have an accessibility service running. Recorded when an instance is hidden per WebContentsObserver#wasHidden (e.g. backgrounded Chrome, opened a new Tab, went to Settings etc), and is equal to the time since the last call to WebContentsObserver#wasShown. This can be recorded multiple times for a single WebContents. mschillaci@google.com chrome-a11y-core@google.com Tracks the total amount of time that this WebContents spent {UsageType}. Recorded when an instance is hidden per WebContentsObserver#wasHidden (e.g. backgrounded Chrome, opened a new Tab, went to Settings etc), and is equal to the time since the last call to WebContentsObserver#wasShown. This can be recorded multiple times for a single WebContents. twellington@chromium.org skym@chromium.org Records the current user font size pref when exiting accessibility settings if the preference was changed. The font size ranges from 50% to 200% and can be set in increments of 5%; the default is 100%. twellington@chromium.org skym@chromium.org Records the current user font size pref during deferred startup for ChromeActivity. The font size ranges from 50% to 200% and can be set in increments of 5%; the default is 100%. aleventhal@chromium.org mschillaci@chromium.org chrome-a11y-core@google.com Deprecated as of 10/2022, M109. Now using the per-variant enum (below). Tracks flags and capabilities of enabled accessibility services. Recorded every time an Android web content view first creates a virtual view hierarchy, indicating that some accessibility service is running. The number of emits of this histogram won't be as useful as the unique user counts. The primary purpose of this is to guide optimization by determining what capabilities of accessibility services are widespread and which ones are relatively rare. mschillaci@google.com aldietz@google.com dtseng@chromium.org chrome-a11y-core@google.com Tracks events, flags, feedback and capabilities of enabled accessibility services separated into variants based on the types of running accessibility services. This information would be a subset of the (now deprecated) Accessibility.AndroidServiceInfo histogram. It will allow us to look at the same histograms but only for a subset of users (e.g. what are the requested flags etc of enabled accessibility services for clients running only a password manager). jdiggs@chromium.org jkim@igalia.com chrome-a11y-core@google.com Tracks usage of ATK APIs on Linux Desktop. Recorded when ATK APIs that are supposed to trigger AX mode enabled is called. abigailbklein@google.com chrome-a11y-core@google.com The total amount of time accessibility was disabled due to being auto-disabled, before being enabled again. abigailbklein@google.com chrome-a11y-core@google.com The total amount of time accessibility was enabled before being auto-disabled. abigailbklein@google.com chrome-a11y-core@google.com The number of user input events that were received within one time window, without any accompanying accessibility API usage, that triggered accessibility to be auto-disabled. kevers@chromium.org chrome-a11y-core@chromium.org Tracks when combinations of mode flags are set. Records when the mode flag changes and aligns with one of the common (named) flag bundles. evliu@google.com chrome-media-ux@google.com Whether custom caption settings were loaded from the user preferences. Recorded when WebKit preferences are overridden. evliu@google.com chrome-media-ux@google.com Whether custom caption settings were loaded from the system preferences. Recorded when WebKit preferences are overridden. dtseng@chromium.org chrome-a11y-core@google.com A user can control ChromeVox via a variety of gestures on the touch screen. For example, swiping right with one finger causes ChromeVox to navigate to the next object. Track all possible gestures here. dtseng@chromium.org kenjibaheux@google.com chrome-a11y-core@google.com Whether the Chrome OS Accessibility Menu is set to be shown regardless of the state of a11y features.(logged once 45 secs after startup). kenjibaheux@google.com dtseng@chromium.org chrome-a11y-core@google.com Whether the Chrome OS Autoclick feature is on (logged once 45 secs after startup). Warning: this histogram was expired 2021-12-31 to 2022-07-07, data might be missing. katie@chromium.org dtseng@chromium.org chrome-a11y-core@google.com Recorded when a user has picked a new autoclick action type from the bubble menu. dtseng@chromium.org chrome-a11y-core@google.com Whether the Chrome OS caret highlighting is on (logged once 45 secs after startup). katie@chromium.org chrome-a11y-core@google.com Whether the Chrome OS color correction settings are on (logged once 45 secs after startup). katie@chromium.org chrome-a11y-core@google.com The color correction filter intensity chosen by the user. Logged once, 45 seconds after startup. For how users adjust the setting from settings, see ChromeOS.Settings.Accessibility.ColorCorrection.FilterAmount, which logs each time the setting changes. katie@chromium.org chrome-a11y-core@google.com The color correction filter type chosen by the user. Logged once, 45 seconds after startup. For how users adjust the setting from settings, see ChromeOS.Settings.Accessibility.ColorCorrection.FilterType, which logs each time the setting changes. dtseng@chromium.org katie@chromium.org chrome-a11y-core@google.com Whether the Chrome OS feature to colorize the cursor is enabled (logged once 45 secs after startup). dtseng@chromium.org chrome-a11y-core@google.com Whether the Chrome OS cursor highlighting is on (logged once 45 secs after startup). anastasi@google.com dtseng@chromium.org chrome-a11y-core@google.com Whether the ChromeOS dictation feature is enabled (logged once 45 secs after startup). katie@chromium.org dtseng@chromium.org chrome-a11y-core@google.com The language used for speech recognition in dictation on ChromeOS. This is logged each time Dictation is toggled on. From M99 to M104 this was logged using base::PersistantHash instead of base::HashMetricName; data from that period can be decoded using a map between the two hashing functions. See crbug.com/1342966. katie@chromium.org chrome-a11y-core@google.com Duration that the network speech recognition service was listening for dictation. Recorded each time a user toggles dictation on until dictation is stopped, either by the user action, error, or timeout. katie@chromium.org chrome-a11y-core@google.com Duration that the on-device speech recognition service was listening for dictation. Recorded each time a user toggles dictation on until dictation is stopped, either by the user action, error, or timeout. akihiroota@chromium.org chrome-a11y-core@google.com Recorded whenever Dictation fails to perform a macro. akihiroota@chromium.org chrome-a11y-core@google.com Recorded whenever Dictation recognizes a macro. akihiroota@chromium.org chrome-a11y-core@google.com Recorded whenever Dictation successfully performs a macro. akihiroota@chromium.org chrome-a11y-core@google.com Records whether Pumpkin successfully parsed a command. This histogram is recorded each time Pumpkin is used to parse a command. anastasi@google.com dtseng@chromium.org chrome-a11y-core@google.com Records how users invoke Dictation. katie@chromium.org chrome-a11y-core@google.com When Dictation was toggled on, records whether on-device speech recognition was used. If on-device recognition was not used, network speech was used. akihiroota@chromium.org chrome-a11y-core@google.com Records whether Pumpkin was used to parse a command. If Pumpkin was not used, then regex parsing was used. This histogram is recorded each time Dictation parses a command. dtseng@chromium.org katie@chromium.org chrome-a11y-core@google.com Whether the Chrome OS Docked Magnifier feature is on (logged once 45 secs after startup). dtseng@chromium.org chrome-a11y-core@google.com Whether the Chrome OS focus highlighting is on (logged once 45 secs after startup). dtseng@chromium.org kenjibaheux@google.com chrome-a11y-core@google.com Whether the Chrome OS High Contrast mode feature is on (logged once 45 secs after startup). dtseng@chromium.org kenjibaheux@google.com chrome-a11y-core@google.com Whether the Chrome OS Large Cursor feature is on (logged once 45 secs after startup). sarakato@chromium.org dtseng@chromium.org chrome-a11y-core@google.com Cursor size of the Chrome OS Large Cursor (logged once 45 secs after startup). dtseng@chromium.org josiahk@google.com kenjibaheux@google.com chrome-a11y-core@google.com Whether the Chrome OS Screen Magnifier feature is on (logged once 45 secs after startup). dtseng@chromium.org katie@chromium.org chrome-a11y-core@google.com Whether the Chrome OS select-to-speak is on (logged once 45 secs after startup). katie@chromium.org chrome-a11y-core@google.com Whether Select-to-Speak had background shading enabled when activated. ajitnarayanan@google.com chrome-a11y-core@google.com When Select-to-speak is active, the user can dismiss the bubble menu in multiple ways: by clicking the cancel button on the Select-to-speak menu or using keyboard shortcuts. Track the methods here. ajitnarayanan@google.com chrome-a11y-core@google.com Whether enhanced network TTS voices were enabled when Select-to-Speak was activated. ajitnarayanan@google.com chrome-a11y-core@google.com Whether Select-to-Speak's navigation controls were on when activated. ajitnarayanan@google.com chrome-a11y-core@google.com The multiplier with which the user overrode the speech rate setting in Select-to-Speak. By default, the global Text-to-Speech setting is used, which the user can temporarily override. The override multiplier is stored as a sparse histogram with values (100 * multiple). For example, a speech rate multiplier of 1.0 (default) will be seen as 100. Emitted once every time playback starts, including on resume after pause or change of selection. ajitnarayanan@google.com chrome-a11y-core@google.com When Select-to-speak is active, the user can navigate between paragraphs in multiple ways: by clicking the navigation buttons on the Select-to-speak menu or using keyboard shortcuts. Track the methods here. ajitnarayanan@google.com chrome-a11y-core@google.com When Select-to-speak is active, the user can navigate between sentences in multiple ways: by clicking the navigation buttons on the Select-to-speak menu or using keyboard shortcuts. Track the methods here. katie@chromium.org chrome-a11y-core@google.com A user may activate Select-to-Speak by holding down 'search' and clicking or dragging a region with the mouse, or by highlighting an area and using search + s to read just the highlighted area. Track the methods here. katie@chromium.org chrome-a11y-core@google.com A user has tapped a button in the tray to change Select-to-Speak's state. The tap was interpreted by Select-to-Speak as a request to start selection, to cancel speech, or to cancel selection, depending on Select-to-Speak's internal state when the tap occured. This tracks when the button was tapped and the event that it generated. ajitnarayanan@google.com chrome-a11y-core@google.com Which TTS engine was used for making TTS requests from Select-to-speak. This is recorded every time a new speech request is made in Select-to-speak. Note that this is only recorded on the start of speech, so it is not recorded, for example, when the user resumes speech after pausing it. gzadina@google.com tbarzic@chromium.org The value for shelf navigation buttons setting set by the user during OOBE. The metric will be reported after the setting has been stable for 10 seconds, or the OOBE screen in which the value can be set is closed (if the setting changes multiple times in quick succession, only the final value will be reported). gzadina@google.com tbarzic@chromium.org The value for shelf navigation buttons setting set by the user in Chrome OS Settings page. The metric will be reported after the setting change has been stable for 10 seconds, or the settings window in which the value is set gets closed (if the setting changes multiple times in quick succession, only the final value will be reported). dtseng@chromium.org kenjibaheux@google.com aleventhal@google.com chrome-a11y-core@google.com Whether the Chrome OS Spoken Feedback feature is on (logged once 45 secs after startup). Note: prefer Accessibility.CrosSpokenFeedback.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} dtseng@chromium.org kenjibaheux@google.com tengs@chromium.org chrome-a11y-core@google.com Whether the Chrome OS Sticky Keys feature is on (logged once 45 secs after startup). dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com Whether the Chrome OS switch access is on (logged once 45 secs after startup). dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com The value of the Switch Access "Auto Scan" setting, logged immediately after toggling. This will show us how often users are turning the feature on, and how often they are turning it back off again. dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com Measures the user-set speed for scanning between keyboard keys in Switch Access, logged immediately after changing the setting. Values range from 1ms to 10000ms, in 100ms buckets. dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com Measures the user-set speed for auto scanning between items in Switch Access, logged immediately after changing the setting. Values range from 1ms to 10000ms, in 100ms buckets. dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com Switch Access error occurred. See CrosSwitchAccessError enum for error types. dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com Which key code user has assigned to the Next Action (e.g. 32 for the Space key) dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com Which key code user has assigned to the Previous Action (e.g. 32 for the Space key) dtseng@chromium.org anastasi@google.com chrome-a11y-core@google.com Which key code user has assigned to the Select Action (e.g. 32 for the Space key) dtseng@chromium.org kenjibaheux@google.com chrome-a11y-core@google.com Whether the Chrome OS Virtual Keyboard feature is on (logged once 45 secs after startup). aldietz@google.com chrome-a11y-core@google.com Records whether the experimental form controls mode flag is set for the AXMode. Tracked when the experimental form controls mode flag is flipped to true. This flag is flipped automatically when software communicates with Chrome via accessibility APIs. As of M115, this flag should only be flipped on when the AccessibilityPerformanceFiltering feature is enabled. This is currently only used on Android OS. aleventhal@chromium.org chrome-a11y-core@google.com The value of the "show a quick focus highlight" setting, logged immediately after toggling. This will show us how often users are turning the feature on, and how often they are turning it back off again. Logged on profile open, including for profiles that do not show web content. (For those profiles, this logged the value of disabled.) Replaced in M-107 with Accessibility.ImageLabels2, which is similar but not logged for unnecessary profiles. katie@chromium.org chrome-a11y-core@google.com Whether the Chrome accessibility image label setting is on. Logged once 45 secs after profile open. dtseng@chromium.org mschillaci@google.com chrome-a11y-core@google.com Whether the Chrome accessibility image label setting is on for Android. Logged once 45 secs after profile open, which always happens when the browser starts. dtseng@chromium.org mschillaci@google.com chrome-a11y-core@google.com When a user opens the accessibility image label dialog on Android, records what option they select on user interaction. dtseng@chromium.org mschillaci@google.com chrome-a11y-core@google.com Whether the Chrome accessibility image label setting for Android is set to only be enabled on a Wi-Fi connection. Logged once 45 secs after profile open, which always happens when the browser starts. katie@chromium.org dtseng@chromium.org Whether a user accepts or does not accept a modal dialog enabling the image labels option. If the user does not accept it this does not track whether they closed it with the negative button, the close button, or keyboard escape. katie@chromium.org dtseng@chromium.org chrome-a11y-core@google.com The language of a web page where image labels were requested, as detected by Chrome (not necessarily what language the page claims to be in). katie@chromium.org dtseng@chromium.org chrome-a11y-core@google.com The language that was requested for image descriptions, based on the page language, the user's accept languages and top languages, and the server languages. dtseng@chromium.org mschillaci@google.com chrome-a11y-core@google.com Counts the number of images that got a certain result from automatic image labeling (empty, error, or success), as a function of the function of one of the image's dimensions - either the min or the max dimension. dtseng@chromium.org mschillaci@google.com chrome-a11y-core@google.com Counts the number of images that got a certain result from automatic image labeling (empty, error, or success), as a function of the function of the length of the characters in the image's name - either the original name, or the name after removing stopwords. katie@chromium.org chrome-a11y-core@google.com Whether the Chrome accessibility image label setting is on. Logged once 45 secs after profile open. Only logged for regular profiles, Incognito profiles, and guest off-the-record profiles, as these are the only profiles that can display web content. aleventhal@chromium.org abigailbklein@chromium.org janewman@microsoft.com The amount of time accessibility was enabled but not actively used. Reported when we switch states from inactive to active. This histogram will not be logged if the auto-disable accessibility feature is enabled. gambard@chromium.org rkgibson@google.com This metric is related to the Preferred Content Size chosen by the user. It is only recorded once per session. This is hit if the chosen category is not listed in the map defined in /ios/chrome/browser/shared/ui/util/dynamic_type_util.mm. In that case, we should update the code by adding an entry for the new category in that map. This is logged when the helper to returning the multiplier associated with the current preferred content size is called. chrishall@chromium.org dtseng@chromium.org chrome-a11y-core@google.com The number of nodes on this page for which language detection was attempted. chrishall@chromium.org dtseng@chromium.org chrome-a11y-core@google.com The number of nodes on this page for which a detected language was successfully assigned. chrishall@chromium.org dtseng@chromium.org chrome-a11y-core@google.com The number of unique languages which were detected to be the most probable language for at least one node on the page, regardless of whether a detected language was assigned for that node. chrishall@chromium.org dtseng@chromium.org chrome-a11y-core@google.com Of the nodes which had a detected language assigned, the percentage for which the assigned language was the language detected as having the highest probability. chrishall@chromium.org dtseng@chromium.org chrome-a11y-core@google.com Of the nodes for which language detection was attempted, the percentage for which a language was successfully assigned. chrishall@chromium.org dtseng@chromium.org chrome-a11y-core@google.com Of the nodes for which a detected language was successfully assigned, the percentage where the assigned language differs from the author-provided language. Replaced in M-109 with the histogram Accessibility.LiveCaption2, which is similar but not logged for unnecessary profiles such as system profiles and unusual ChromeOS profiles (sign-in profile, etc.) katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Whether the Live Caption feature is enabled. This is logged once when the Live Caption controller is initialized on platforms that support Live Caption. katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Whether the sample rate or channel count of a Live Caption audio stream changed midstream. This is logged once per audio stream on the destruction of the Cloud speech recognition client. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Records when the caption bubble displays an error. This is logged once each time the caption bubble model encounters an error. Deprecated as of 09/2022. Now using Accessibility.LiveCaption.Duration.CaptionBubble{Visibility}3 This metric measured the total speech recognition time not only for Live Caption but also for other applications that use SODA. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Measures how long SODA was running while the Live Caption UI was {Visibility}. Logged once on the destruction of the SpeechRecognitionRecognizerImpl. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Measures how long SODA was running while the Live Caption UI was {Visibility}. Logged once on the destruction of the SpeechRecognitionRecognizerImpl. katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Records when a user enables or disables the Live Caption feature from {Entrypoint}. katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Records when a user expands or collapses the Live Caption bubble. Replaced in M-109 with the histogram Accessibility.LiveCaption.FeatureEnabled2, which is similar but not logged for unnecessary profiles such as system profiles and unusual ChromeOS profiles (sign-in profile, etc.) katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Whether the Live Caption feature flag is enabled. This is logged once at the time of component registration. katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Whether the Live Caption feature flag is enabled. This is logged once when the Live Caption controller is initialized. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Records when a user pins or unpins the Live Caption bubble. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com The error code of a failed attempt to load the Speech On-Device API (SODA) binary. This is logged once for each media stream if the SODA binary failed to load on Windows. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com The result of an attempt to load the Speech On-Device API (SODA) binary. This is logged once for each media stream when the SODA binary is loaded. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Records when a user toggles the "hide profanity" option in settings. katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Logged when the Live Caption bubble appears and disappears. Stream start indicates when the bubble appears due to an audio session starting. Stream end indicates when the bubble disappears due to a tab change, a navigation, or the audio session ending and the bubble fading out due to inactivity. Close button clicked indicates when the bubble disappears due to a user clicking the close button on the caption bubble. abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Whether the verification of the Speech On-Device API (SODA) component failed due to a mismatch of the component architecture. Logged once during the verification step of the SODA component installation on Windows only. evliu@google.com chrome-media-ux@google.com chrome-a11y-core@google.com The language code used to initialize the speech recognition service. Logged once when getting the Speech On-Device API (SODA) config path to use with the speech recognition service. evliu@google.com chrome-media-ux@google.com chrome-a11y-core@google.com Whether the speech recognition session contains any recognized speech. This is logged once per media stream upon the destruction of the SpeechRecognitionRecognizerImpl. katie@chromium.org abigailbklein@google.com evliu@google.com chrome-a11y-core@google.com Whether the Live Caption feature is enabled. This is logged once when the Live Caption controller is initialized on platforms that support Live Caption. evliu@google.com chrome-a11y-core@google.com Records the number of characters sent to the translate service. Records once per session upon the destruction of the LiveCaptionSpeechRecognitionHost. evliu@google.com chrome-a11y-core@google.com Records when a user enables or disables the Live Translate feature from {Entrypoint}. Warning: this histogram was expired from 2024-06-13 to 2024-08-15; data may be missing. evliu@google.com chrome-a11y-core@google.com Records the source language of a request to the Cloud Translate service. Recorded once per call to the Cloud Translate service. evliu@google.com chrome-a11y-core@google.com Records the target language of a request to the Cloud Translate service. Recorded once per call to the Cloud Translate service. aleventhal@chromium.org chrome-a11y-core@google.com Tracks whether a screen reader is enabled on Mac (e.g. VoiceOver). This is logged once, 45 seconds after startup. Note: prefer Accessibility.Mac.ScreenReader.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} aleventhal@chromium.org kenjibaheux@google.com chrome-a11y-core@google.com Whether Chrome has enabled accessibility support because the user passed the --force-renderer-accessibility flag on the command-line (logged once 45 secs after startup). aleventhal@chromium.org chrome-a11y-core@google.com Whether individual accessibility mode flags are set. Tracked when each mode flag is flipped from false to true. These flags are flipped automatically when software communicates with Chrome via accessibility APIs. Flags can only be flipped off by advanced users or for debugging using chrome://accessibility/ - and that isn't tracked in this histogram. jessejames@chromium.org rsorokin@chromium.org alemate@chromium.org cros-oac@google.com Delay between login_prompt_visible and Chrome OS OOBE startup sound playback. Depends on sound subsystem initialization time. dtseng@chromium.org nektar@chromium.org chrome-a11y-core@google.com When a PDF is constructed for accessibility, true if any page of the PDF contains any accessible text derived from a text run. Note that a PDF containing a mix of images and text will record true even though the images may themselves contain inaccessible text. kyungjunlee@google.com chrome-a11y-core@google.com When an inaccessible PDF is loaded, true if the PDF OCR feature was turned on to extract text from images; false if the PDF OCR feature was turned off and the feature notification was added to a PDF accessibility tree. kyungjunlee@google.com chrome-a11y-core@google.com Records the number of pages in an inaccessible PDF when a PDF accessibility tree gets created for the PDF. kyungjunlee@google.com chrome-a11y-core@google.com Records the language that is detected most in each OCR data when a PDF accessibility tree receives the OCR data from the OCR model. kyungjunlee@google.com chrome-a11y-core@google.com Tracks the status of PDF OCR request per PDF image. It checks whether a PDF OCR request is sent to the OCR model or performed by the OCR model. This metric helps to measure whether the OCR model manages to respond to all requests successfully or whether the user closes a PDF without waiting for OCR process to be done. kyungjunlee@google.com chrome-a11y-core@google.com Records user accept languages when PDF OCR first runs for the always mode after user login; or whenever the user uses the once mode to extract text from a PDF file. kyungjunlee@google.com chrome-a11y-core@google.com Tracks the PDF OCR menu item that the user selects to turn on or off the PDF OCR feature. aleventhal@chromium.org chrome-a11y-core@google.com Tracks how many Blink accessibility nodes are being redundantly serialized whenever the renderer process sends a batch of AXTreeUpdates to the browser process. Logged every time the document layout is clean and we need update the the accessibility tree. agarwaltushar@google.com olivierli@chromium.org Tracks time spent in AXTree::Destroy. The primary use is to measure the impact of https://crrev.com/c/3937946, which updates AXTree to internally use a std::map instead of a base::flat_map. Please see the CL description for more context and a performance profile. aleventhal@chromium.org chrome-a11y-core@google.com Tracks time spent on the browser main thread handling accessibility events sent from the renderer process and processed by BrowserAccessibilityManager. Accessibility.Performance.HandleAXEvents can still often record values when processing is relatively cheap because we exit before handing off the nodes to BrowserAccessibilityManager for various reasons (e.g. BFCache). This histogram only measures events which are processed by BrowserAccessibilityManager and thus should have a better histogram to understand the cost of doing so, and be used to meaure optimizations. aleventhal@chromium.org chrome-a11y-core@google.com Tracks time spent on the browser main thread handling accessibility events sent from the renderer process. Logged each time the method is run without returning early. aleventhal@chromium.org janewman@microsoft.com chrome-a11y-core@google.com Tracks time spent on the render process processing deferred accessibility events. Logged each time the method is run during the accessbility document lifecycle. aleventhal@chromium.org janewman@microsoft.com chrome-a11y-core@google.com Tracks time spent on the render process sending pending accessibility events. Logged each time the method is run without returning early. aleventhal@chromium.org janewman@microsoft.com chrome-a11y-core@google.com Tracks time spent on the browser process unserializing accessibility updates. Logged each time the method is run without returning early. aleventhal@chromium.org kschmi@microsoft.com janewman@microsoft.com dlibby@microsoft.com chrome-a11y-core@google.com Tracks time taken to execute the public Windows API that {API}. This is recorded for all Windows users that call into our public APIs. Warning: This metric may include reports from clients with low-resolution clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports will cause this metric to have an abnormal distribution. When considering revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the solution. abigailbklein@google.com chrome-a11y-core@google.com Records the user-chosen color theme for the Read Anything panel. abigailbklein@google.com chrome-a11y-core@google.com Records when the Read Anything panel displays the empty state and whether a user does a selection after it's shown. abigailbklein@google.com chrome-a11y-core@google.com Records the user-chosen font name for the Read Anything panel. abigailbklein@google.com chrome-a11y-core@google.com Records the user-chosen font scale for the Read Anything panel. abigailbklein@google.com chrome-a11y-core@google.com Records the language of the web page shown in Read Anything after the corresponding AXTree is distilled. abigailbklein@google.com chrome-a11y-core@google.com Records the user-chosen letter spacing for the Read Anything panel. abigailbklein@google.com chrome-a11y-core@google.com Records the user-chosen line spacing for the Read Anything panel. abigailbklein@google.com chrome-a11y-core@google.com Records the time taken to distill a web page using the merged algorithm that combines results from the rules based algorithm and the ML model. Refer to AXTreeDistiller::Distill for details. abigailbklein@google.com chrome-a11y-core@google.com Records the time taken to distill a web page using the rules based algorithm. Refer to AXTreeDistiller::DistillViaAlgorithm for details. abigailbklein@google.com chrome-a11y-core@google.com Records when a scroll happens. abigailbklein@google.com chrome-a11y-core@google.com Records when the user changes a text style setting in the Read Anything panel. aleventhal@chromium.org janewman@microsoft.com chrome-a11y-core@google.com Tracks the type of failure that occured when unserializing the accessibility tree. When an error in unserialization occurs, this is emitted and unserialization aborts. In the case of a tree with multiple issues, only the first error is recorded. Refer to AXTree::Unserialize for details. kyungjunlee@google.com chrome-a11y-core@google.com Records the time taken to get a screenshot for ScreenAI visual annotator for cases where the action {Result}. It's being emitted each time whenever it gets or fails to get a screenshot for ScreenAI visual annotator. Refer to AXScreenAIAnnotator::OnScreenshotReceived for details. rhalavati@chromium.org chrome-a11y-core@google.com Records the number of times that the component installation has failed as DLC service was busy and retried before successful install. rhalavati@chromium.org chrome-a11y-core@google.com Records success or failure of Screen AI component {Action}. rhalavati@chromium.org chrome-a11y-core@google.com Records a Screen AI library load result on Windows. The result is recorded after initialization of Screen AI service and loading chrome_screen_ai.dll. Deprecated in May 2023 and replaced with several boolean histograms for different functionality initialization of the library. See Accessibility.ScreenAI.*.Initialized kyungjunlee@google.com chrome-a11y-core@google.com Records whether it loads or fails to load necessary Screen AI libraries. It's being emitted when loading Screen AI libraries according to the configuration. Refer to ScreenAIService::LoadLibrary for details. Removed in July 2023 in favor of Accessibility.ScreenAI.OCR.ImageSize10M which has a higher max value. rhalavati@chromium.org chrome-a11y-core@google.com Records the number of pixels in the passed image to OCR request. rhalavati@chromium.org chrome-a11y-core@google.com Records the number of pixels in the passed image to OCR request. rhalavati@chromium.org chrome-a11y-core@google.com Records how long an OCR request in Screen AI service takes. abigailbklein@google.com rhalavati@google.com kyungjunlee@google.com chrome-a11y-core@google.com Records the time taken to distill a web page for cases where the action {Result}. It's being emitted each time whenever it distills or fails to distill a page. for Screen2x. Refer to ScreenAIService::ExtractMainContentInternal for details. kyungjunlee@google.com chrome-a11y-core@google.com Records the number of annotations produced by ScreenAI visual annotator. It's being emitted whenever getting annotations from ScreenAI visual annotator. rhalavati@chromium.org chrome-a11y-core@google.com Records if initialization of {Step} in Screen AI service was successful or not. evliu@google.com chrome-media-ux@google.com Whether a VTT file contains an embedded style block. Recorded when a VTT file is parsed. evliu@google.com chrome-media-ux@google.com Measures the duration of a call to the WebSpeech API. Recorded once per call to the Open Speech API that powers the WebSpeech API. aleventhal@chromium.org nektar@chromium.org chrome-a11y-core@google.com Tracks usage of all public Windows accessibility APIs. aleventhal@chromium.org nektar@chromium.org dlibby@microsoft.com chrome-a11y-core@google.com Tracks properties requested via UI Automation GetPropertyValue(). kenjibaheux@google.com aleventhal@chromium.org chrome-a11y-core@google.com Whether the third-party JAWS screen reader is running (logged once 45 secs after startup). Note: prefer Accessibility.WinJAWS.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} kenjibaheux@google.com aleventhal@chromium.org chrome-a11y-core@google.com Whether the third-party NVDA screen reader is running (logged once 45 secs after startup). Note: prefer Accessibility.WinNVDA.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} aleventhal@chromium.org chrome-a11y-core@google.com Whether the accessibility mode flag shows that a screen reader is running (logged once 45 secs after startup). In this case, Chrome has detected accessibility calls that would normally only occur from a screen reader. See also the more specific metrics such as Accessibility.WinJAWS/WinNVDA. Note: prefer Accessibility.WinScreenReader2.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} kenjibaheux@google.com aleventhal@chromium.org chrome-a11y-core@google.com Whether Windows system settings show that Sticky Keys are enabled. kenjibaheux@google.com aleventhal@chromium.org chrome-a11y-core@google.com Whether the third-party Supernova screen reader is running (logged once 45 secs after startup). Note: prefer Accessibility.Supernova.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} kenjibaheux@google.com aleventhal@chromium.org chrome-a11y-core@google.com Whether the third-party ZoomText screen magnifier is running. Note: prefer Accessibility.WinZoomText.EveryReport when querying for unique users, as it is logged more frequently. {AccessibilityEveryReport} Deprecated in January 2023 as part of message post-launch cleanup since the messages system records dismissal reasons using Android.Messages.Dismissed.ReaderMode. mdjones@chromium.org "Used" is recorded when the user clicks the infobar to enter Reader Mode. "Not Used" is recorded when the user clicks the close button. If there's no user action, nothing is recorded. twellington@chromium.org aishwaryarj@google.com Records whether the user accepted or ignored/dismissed the Reader Mode message prompt in conjunction with the Reader Mode accessibility setting. Recorded for Android only. kuan@chromium.org Records whether a page has distilled data. katie@chromium.org gilmanmh@google.com chrome-a11y-core@google.com The method a user used to enter reader mode on an article. katie@chromium.org gilmanmh@google.com chrome-a11y-core@google.com The method a user used to exit reader mode and return to the original article. mdjones@chromium.org Records if the panel became visible at any point after a page was navigated. mdjones@chromium.org Records the number of words in a distilled page. This only records the first page of a multi-page article. Removed in April 2023. nyquist@chromium.org Records the number of words in a distilled page. For articles with multiple pages, each page is counted separately. Removed in M118. katie@chromium.org chrome-a11y-core@chromium.org Records the amount of active time a user spent on a distillable page before switching that page to Reader Mode. Active time is time that the article was visible, not total time the page was open: the timer is paused when the page is not visible. This is not recorded when the user opens a distillable page but does not switch to Reader Mode from that page (via the omnibox icon or menu option). Removed in April 2023. yfriedman@chromium.org Time spent in DomDistiller's identification of text content. Removed in April 2023. yfriedman@chromium.org Complete time spent in DomDistiller's processing of a page. Removed in April 2023. wychen@chromium.org Time spent in DistillPageImpl(), mostly ExecuteJavaScript(), including compilation and execution. Removed in April 2023. yfriedman@chromium.org Time spent in creating DomDistiller's internal representation of the HTML document. Removed in April 2023. yfriedman@chromium.org Time spent in DomDistiller's final processing of article content/formatting. Removed in April 2023. yfriedman@chromium.org Time spent in DomDistiller's processing of article metadata. wychen@chromium.org Records the time from the Reader Mode panel opening to the viewer loaded. mdjones@chromium.org Records the amount of time a user spent on a Reader Mode Page. akihiroota@chromium.org chrome-a11y-core@google.com Pumpkin installation is triggered when one of the features using Pumpkin (currently the only feature using Pumpkin is Dictation) are enabled. This histogram is recorded once when Pumpkin installation finishes with either success or failure. abigailbklein@google.com evliu@google.com yilkal@chromium.org Soda Installation is triggered when one of the features using SODA (e.g. Live Caption, Projector, Offline Dictation) are enabled. Records the time taken to get to SODA binary installation error. This is recorded once when SODA installation attempt fails. abigailbklein@google.com evliu@google.com yilkal@chromium.org Soda Installation is triggered when one of the features using SODA (e.g. Live Caption, Projector, Offline Dictation) are enabled. Records whether SODA binary installation succeeded. This is recorded once when SODA installation attempt finishes with either success or failure. abigailbklein@google.com evliu@google.com yilkal@chromium.org Soda Installation is triggered when one of the features using SODA (e.g. Live Caption, Projector, Offline Dictation) are enabled. Records the time taken to successfully install SODA binary. This is recorded once when SODA installation attempt succeedes. abigailbklein@google.com evliu@google.com yilkal@chromium.org Soda Installation is triggered when one of the features using SODA (e.g. Live Caption, Projector, Offline Dictation) are enabled. Records the time taken to get to SODA language pack installation error. This is recorded once when SODA language pack installation attempt fails. abigailbklein@google.com evliu@google.com yilkal@chromium.org Soda Installation is triggered when one of the features using SODA (e.g. Live Caption, Projector, Offline Dictation) are enabled. Records whether SODA language pack installation succeeded or not. This is recorded once when SODA language pack installation attempt finishes with either success or failure. abigailbklein@google.com evliu@google.com yilkal@chromium.org Soda Installation is triggered when one of the features using SODA (e.g. Live Caption, Projector, Offline Dictation) are enabled. Records the time taken to successfully install SODA language pack. This is recorded once when SODA language pack installation succeedes. dtseng@chromium.org katie@chromium.org chrome-a11y-core@google.com Events fired by the text-to-speech engine when speaking an utterance. josiahk@chromium.org akihiroota@chromium.org chrome-a11y-core@google.com When the user requests a download of a text-to-speech voice, records the success/failure result, and service used to download it. dtseng@chromium.org katie@chromium.org chrome-a11y-core@google.com Indicates if an utterance spoken via synthesized text-to-speech was triggered by the Chrome TTS extension API or the web speech API. katie@chromium.org chrome-a11y-core@google.com True if an utterance spoken via synthesized text-to-speech requested a specific voice by name. katie@chromium.org chrome-a11y-core@google.com True if an utterance is spoken with native speech provided by the operating system, otherwise it's spoken via a Chrome extension that implements text-to-speech support. dtseng@chromium.org chrome-a11y-core@google.com The rate of an utterance to be spoken via synthesized text-to-speech. joelriley@google.com katie@chromium.org chrome-a11y-core@google.com ChromeOS source that triggered text-to-speech utterance via extension API, from a few known accessibility clients (Select-to-speak, ChromeVox). katie@chromium.org chrome-a11y-core@google.com The length of an utterance to be spoken via synthesized text-to-speech.