Removed 2021/09. mkwst@chromium.org brandm@microsoft.com Records if various requests to access storage are allowed or not and if the Storage Access API unblocked the request or not. Recorded whenever a decision to access storage like getting/setting cookies or opening an indexeddb connection is made in CookieSettings. This histogram erroneously recorded ALLOW when cookies were globally blocked. mkwst@chromium.org brandm@microsoft.com Records if various requests to access storage are allowed or not and if the Storage Access API unblocked the request or not. Recorded whenever a decision to access storage like getting/setting cookies or opening an indexeddb connection is made in CookieSettings. Warning: this histogram was expired from 2022-03-27 to 08-12-2022; data may be missing. cfredric@chromium.org johannhof@chromium.org Records whether or not a document inherited the `has_storage_access` bit from the previous document. Recorded once at document commit, for every document. cfredric@chromium.org johannhof@chromium.org Records whether or not a document was loaded with the `has_storage_access` bit set to true. Recorded once at document commit, for every document. mkwst@chromium.org brandm@microsoft.com Records if a generated grant was implicit or explicit at the time it was created. Warning: this histogram was expired from 2020-11-27 to 08-12-2022; data may be missing. cfredric@chromium.org kaustubhag@chromium.org Records the signals used to decide whether to unblock cookie access (in the network service) via the Storage Access API. This metric is recorded each time CookieSettings are queried and the Storage Access API is relevant (i.e. third-party cookies are blocked by user setting, and there's no site-specific override that takes precedence). This is recorded regardless of whether the Storage Access API is enabled in the browser. This metric is only recorded in the network service, not in the browser's CookieSettings object, since the browser's accesses supply hardcoded override signals and therefore are not interesting to analyze. cfredric@chromium.org brandm@microsoft.com Records the outcome of a particular Storage Access API permission request. Recorded at the time of the request, for every request. mkwst@chromium.org cfredric@chromium.org brandm@microsoft.com Records requests to use document.requestStorageAccess and reasons the request may be approved or rejected. Recorded by the renderer exactly once for each invocation of document.requestStorageAccess. Metric collection is being separated from the standard Storage Access API. See API.TopLevelStorageAccess.RequestStorageAccessForOrigin. Note that future re-consolidation of these metrics may be possible. cfredric@chromium.org mreichhoff@chromium.org brandm@microsoft.com Records invocations of document.requestStorageAccessForOrigin and reasons the request was approved or rejected. Recorded for every call to the function, regardless of outcome. Note that API.StorageAccess.RequestStorageAccess is similar, but for the other variant of this API. cfredric@chromium.org mreichhoff@chromium.org Records the outcome of a particular Top-Level Storage Access API permission request. Recorded at the time of the request, for every request. cfredric@chromium.org mreichhoff@chromium.org Records invocations of document.requestStorageAccessFor and reasons the request was approved or rejected. Recorded for every call to the function, regardless of outcome. Note that API.StorageAccess.RequestStorageAccess is similar, but for the other variant of this API. The function was renamed. See API.TopLevelStorageAccess.RequestStorageAccessFor. cfredric@chromium.org mreichhoff@chromium.org Records invocations of document.requestStorageAccessForOrigin and reasons the request was approved or rejected. Recorded for every call to the function, regardless of outcome. Note that API.StorageAccess.RequestStorageAccess is similar, but for the other variant of this API. huangdarwin@chromium.org src/ui/base/clipboard/OWNERS Counts how often each Clipboard format is read by the platform clipboard. These reads generally imply that an application requested this format after checking that the format is available, but there are some cases where Chrome reads a format to check for existence (outside the ui::Clipboard::ReadAvailableTypes() function). Please prefer interpreting these numbers as relative use changes, as opposed to absolute user usage. dcheng@chromium.org src/ui/base/clipboard/OWNERS Records the time interval between when clipboard data was committed to the clipboard and the same clipboard data was read from the clipboard. The same clipboard data may be read multiple times. Emitted at the moment the clipboard data was read. Currently only implemented for Chrome OS' in-memory clipboard (`ui::ClipboardNonBacked`). huangdarwin@chromium.org src/ui/base/clipboard/OWNERS Counts how often each Clipboard format is written by the platform clipboard. These writes all imply that an application had this format available, and therefore wrote this format. ayui@chromium.org chrome-owp-storage@google.com Tracks the success rate of deleting an unused leveldb table backup file. ayui@chromium.org chrome-owp-storage@google.com Methods where leveldb's Chromium environment has IO errors. ayui@chromium.org chrome-owp-storage@google.com Number of backup files found without corresponding ldb files. As measured by GetChildren when used in LevelDB clients other than IndexedDB. ayui@chromium.org chrome-owp-storage@google.com Delay between the browser process receiving changes and those changes being written to the DB. ayui@chromium.org chrome-owp-storage@google.com Methods where leveldb's Mojo environment has IO errors. This histogram has expired between M87-106. asully@chromium.org chrome-owp-storage@google.com Outcome of attempting to recover a database with sql::BuiltInRecovery. asully@chromium.org chrome-owp-storage@google.com SQLite result code from attempting to recover a database with sql::BuiltInRecovery. Note that kNoError does not necessarily indicate that recovery succeeded (see Sql.Recovery.Result for that information), since not all recoveries fail due to SQLite errors (e.g. if a version number could not be read from the meta table). ayui@chromium.org chrome-owp-storage@google.com This is recorded for every site that the user blocklists when they when they clear browsing data. It indicates which signals were used to show the given site to the user that the user then chose to exclude from clearing. This histogram has expired between M95-M106. awillia@chromium.org chrome-owp-storage@chromium.org Recorded when the PublicURLManager::RegisterURL method calls the per-process BlobURLStore::Register mojo interface method. The value recorded is the time taken for the call to complete. This histogram is only logged when the SupportPartitionedBlobUrl feature is disabled. awillia@chromium.org chrome-owp-storage@chromium.org Recorded when the PublicURLManager::RegisterURL method calls the BlobURLStore::Register mojo interface method. The value recorded is the time taken for the call to complete. This variation of the histogram records results from {Type}. This histogram is only logged when the SupportPartitionedBlobUrl feature is enabled. estade@chromium.org chrome-owp-storage@google.com Counts the number of storage buckets in existence for a StorageKey when a new one is created (including the new one). This is intended to give an idea of the number of buckets individual apps use. Note: the count in histogram bucket 1 correlates to the total number of sites that use the buckets API (per Chrome client). The count in histogram bucket N, divided by the size of the bucket, correlates to the number of sites for that Chrome client which use at least that many buckets. estade@chromium.org chrome-owp-storage@google.com The requested durability for a bucket when it is open()ed. estade@chromium.org chrome-owp-storage@google.com The expiration time for a bucket, in minutes, if provided when it is open()ed. If not provided, the underflow bucket is used. estade@chromium.org chrome-owp-storage@google.com The requested persistence for a bucket when it is open()ed. estade@chromium.org chrome-owp-storage@google.com The requested quota for a bucket, in kB, if provided. If not provided, the underflow bucket is used. Logged when the bucket is open()ed. estade@chromium.org chrome-owp-storage@google.com A Clear-Site-Data response header was seen with the given values. asully@chromium.org src/content/browser/file_system_access/OWNERS The result of an attempt to request permission to a file or directory via the File System Access API. ayui@chromium.org chrome-owp-storage@google.com When a user chooses to blocklist one or more sites when they clear browsing data, this is recorded for every reason each chosen site was marked as important. It indicates which signals were used to show the given site to the user that the user then chose to exclude from clearing. This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com This records the number of reasons each important site had that the user chose to blocklist when clearing browsing data. This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com When a user chooses to blocklist one or more sites when they clear browsing data, this is recorded for every reason each unchosen site was marked as important. It indicates which signals were used to show the given site to the user, which the user then ignored and did not select to blocklist from clearing data. This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com This records the number of reasons each important site had that the user chose to NOT blocklist when clearing browsing data. This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com Recorded when we generate a list of important sites. This can happen when the user opens the Clear Browsing Data dialog on Android, views the Storage tab in Site Settings on Android, or launches 'Manage Storage' from Android System Settings for Chrome. We record every reason each site was chosen in this metric. This means that we can report this metric multiple times for a single site. This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com This records the number of reasons qualifying a site for being 'important'. We record this for every site when we generate a list of important sites, described in "Storage.ImportantSites.GeneratedReason". This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com The time it takes to generate the list of 'important' sites. This list is generated when the user enters the 'Clear Browsing Dialog' or the 'Manage Space' screens for Chrome, both of which are on Android. This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com Records the size of a blob used in an IndexedDB add/put operation. Recorded for every put operation that contains a blob. This histogram has expired between M95-M106. ayui@chromium.org chrome-owp-storage@google.com Records if a blob intended to be used in an IndexedDB add/put operation is a valid blob. Recorded for every put operation that contains a blob. This histogram has expired between M95-M106. behamilton@google.com pauljensen@chromium.org Records the number of database errors that occur when accessing interest group storage. behamilton@google.com pauljensen@chromium.org Records the time spent performing database maintenance on the interest group storage. Recorded when maintenance is run (approximately once an hour). Note that clients without high-resolution clocks will report 0 for very short times. behamilton@google.com pauljensen@chromium.org Records the size of the InterestGroup database. Collected prior to database maintenance. behamilton@google.com pauljensen@chromium.org Records the number of interest groups loaded for a single group owner when running an ad auction. Recorded for each owner involved in a running ad auction. ayui@chromium.org chrome-owp-storage@google.com The renderer side cache hit rate metrics for new HTML5 SessionStorage DB opened. This histogram has expired between M97-106. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Count of database entries queued to be sent to the async iterator. Recorded in `SharedStorageIterator::DidReadEntries()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com For each of a set of benchmark percentages, we record that benchmark when the async iterator first iterates through at least that percentage of queued entries. Recorded in `SharedStorageIterator::NextHelper()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com For each of a set of benchmark percentages, we record that benchmark when the async iterator first receives from the database at least that percentage of queued entries. Recorded in `SharedStorageIterator::DidReadEntries()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Whether destruction was successful after a catastrophic error that occurred in Shared Storage. Recorded by SharedStorageDatabase::DatabaseErrorCallback() just after the SQLite database called RazeAndClose() and then, if it was file-backed, SharedStorageDatabase attempted to delete the file. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Errors that occur in Shared Storage. Recorded by SharedStorageDatabase::DatabaseErrorCallback() just before the SQLite database determines whether the error is catastrophic and handles it accordingly. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com The size in gigabytes of the SQL database file backing `SharedStorageDatabase`. Measured only for file-backed databases of size at least one gigabyte. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com The size in kilobytes of the SQL database file backing `SharedStorageDatabase`. Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Maximum origin length, according to the `per_origin_mapping` of `SharedStorageDatabase`. Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Median origin length, according to the `per_origin_mapping` of `SharedStorageDatabase`. Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Minimum origin length, according to the `per_origin_mapping` of `SharedStorageDatabase`. Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Lower quartile of the origin lengths, as listed in the `per_origin_mapping` of `SharedStorageDatabase` (calculated through Method 1 from https://en.wikipedia.org/wiki/Quartile). Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Upper quartile of the origin lengths, as listed in the `per_origin_mapping` of `SharedStorageDatabase` (calculated through Method 1 from https://en.wikipedia.org/wiki/Quartile). Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com The total count of entries in the `values_mapping` of `SharedStorageDatabase`. Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Number of origins in the `per_origin_mapping` of `SharedStorageDatabase`. Measured for file-backed databases only. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Whether or not the database is file-backed. Recorded in `SharedStorageDatabase::InitImpl()` via `LogInitHistograms()` when initialization is successful. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `blink::SharedStorageWorklet::AddModule()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in the lambda function callback for `blink::SharedStorageWorklet::AddModule()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `blink::SharedStorage::Append()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `blink::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `blink::SharedStorage::Clear()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `blink::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `blink::SharedStorage::Delete()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `blink::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `blink::SharedStorage::Run()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `blink::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from when the end of the call to `SharedStorageWorkletHost::RunOperationOnWorklet()` to the end of `SharedStorageWorkletHost::OnRunOperationOnWorkletFinished()`. Recorded in `SharedStorageWorkletHost::OnRunOperationOnWorkletFinished()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `blink::SharedStorage::SelectURL()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in the lambda function callback for `blink::SharedStorage::SelectURL()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from when the mojo callback runs in `SharedStorageWorkletHost::RunURLSelectionOperationOnWorklet()` to the end of `SharedStorageWorkletHost::OnRunURLSelectionOperationOnWorkletFinished()`. Only measured for calls where the mojo callback has run with a parameter `success` equal to true. Recorded in `SharedStorageWorkletHost::OnRunURLSelectionOperationOnWorkletFinished()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `blink::SharedStorage::Set()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `blink::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Count of SQL errors that have occurred in Shared Storage. Recorded by SharedStorageManager::RecordShutdownMetrics() when the StoragePartitionImpl is destroyed. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Whether or not the SharedStorageManager tried to recover from SharedStorageDatabase::InitStatus::kInitFailure. Recorded by SharedStorageManager::RecordShutdownMetrics() when the StoragePartitionImpl is destroyed. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Whether or not the SharedStorageManager tried to recover from SharedStorageDatabase::InitStatus::kInitFailure on disk. Recorded by SharedStorageManager::RecordShutdownMetrics() when the StoragePartitionImpl is destroyed. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time for a URN to resolve during a navigation. Recorded for every navigation to a URN that originates from sharedStorage.selectURL(). cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Records true if a given call to `sharedStorage.context()` returns a defined string, false if the call to `sharedStorage.context()` returns undefined. Recorded in the worklet service in the call to `SharedStorage::Context()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Whether or not the worklet entered keep-alive phase before destruction, and if it did enter keep-alive, whether the keep-alive was terminated by operations finishing or due to timeout. Recorded in the destructor of `SharedStorageWokletHost`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Type of error encountered by the SharedStorageWorklet in either `addModule()`, `run()`, or `selectURL()`. Recorded after an exception is thrown, after a callback is run with `/*success=*/false`, after a call to `ReportBadMessage()`, and/or just before the rejected promise is returned, via the utility method `LogWorkletError()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the number of `SharedStorageWorkletHost`'s created by a given page. Recorded in `SharedStoragePageLoadMetricsObserver::RecordSessionEndHistogram()` when metrics are flushed due to the pageload completing or the app entering the background. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `shared_storage_worklet::SharedStorage::Append()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `shared_storage_worklet::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `shared_storage_worklet::SharedStorage::Clear()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `shared_storage_worklet::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `shared_storage_worklet::SharedStorage::Delete()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `shared_storage_worklet::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from the start of the call to `shared_storage_worklet::SharedStorageiterator::Next()` to just before the promise is returned, for the iterator in `Mode::kKeyValue`. Includes only calls where `has_error_` is false. Recorded in `shared_storage_worklet::SharedStorageIterator::NextHelper()` via `LogElapsedTime()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `shared_storage_worklet::SharedStorage::Get()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `shared_storage_worklet::SharedStorage::OnStringRetrievalOperationFinished()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from entering keep alive until the start of the call to `FinishKeepAlive()` for keep-alives that are terminated when operations end (i.e. excludes worklets whose keep-alives are terminated via timeout). Recorded in `SharedStorageWokletHost::FinishKeepAlive()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from the start of the call to `shared_storage_worklet::SharedStorageiterator::Next()` to just before the promise is returned, for the iterator in `Mode::kKey`. Includes only calls where `has_error_` is false. Recorded in `shared_storage_worklet::SharedStorageIterator::NextHelper()` via `LogElapsedTime()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `shared_storage_worklet::SharedStorage::Length()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `shared_storage_worklet::SharedStorage::OnLengthOperationFinished()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `shared_storage_worklet::SharedStorage::RemainingBudget()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `shared_storage_worklet::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the time from start of the call to `shared_storage_worklet::SharedStorage::Set()` to when the callback has successfully completed. Does not measure the timing of calls that end in an error. Recorded in `shared_storage_worklet::SharedStorage::OnVoidOperationFinished()` via `LogTimingHistogramForVoidOperation()`. cammie@chromium.org yaoxia@chromium.org chrome-ads-histograms@google.com Measures the percentage of the time duration between a `SharedStorageWorkletHost`'s creation and destruction that occurs before the time of its last finished operation. For worklets that are destroyed before completing their outstanding operations, we record 100. Recorded in the destructor of `SharedStorageWorkletHost`. ayui@chromium.org chrome-owp-storage@google.com How did the user interact with the StoragePressure Bubble? Ignored means the user did not click on the positive button before the bubble is closed (either manually closed or when the browser closes). ayui@chromium.org chrome-owp-storage@google.com Counts the number of WebSQL databases opened for secure vs insecure origins.