tools/metrics/histograms/metadata/dev/histograms.xml - chromium/src - Git at Google

 <!--
 Copyright 2020 The Chromium Authors
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->

 <!--
 This file is used to generate a comprehensive list of Dev histograms
 along with a detailed description for each histogram.

 For best practices on writing histogram descriptions, see
 https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md

 Please follow the instructions in the OWNERS file in this directory to find a
 reviewer. If no OWNERS file exists, please consider signing up at
 go/reviewing-metrics (Googlers only), as all subdirectories are expected to
 have an OWNERS file. As a last resort you can send the CL to
 chromium-metrics-reviews@google.com.
 -->

 <histogram-configuration>

 <histograms>

 <histogram name="DevTools.ActionTaken" enum="DevToolsAction"
     expires_after="2023-10-22">
   <owner>alph@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>Specified DevTools action has been taken.</summary>
 </histogram>

 <histogram name="DevTools.BreakpointEditDialogRevealedFrom"
     enum="DevToolsBreakpointEditDialogRevealedFrom" expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>jarin@chromium.org</owner>
   <owner>kimanh@chromium.org</owner>
   <summary>
     Records the ways in which the Breakpoint Edit Dialog was opened.
   </summary>
 </histogram>

 <histogram name="DevTools.BreakpointsRestoredFromStorageCount"
     enum="DevToolsBreakpointsRestoredFromStorageCount"
     expires_after="2024-03-01">
   <owner>jarin@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Records the number of breakpoints restored from the storage. The breakpoint
     count is restored when the debugger is initialized.
   </summary>
 </histogram>

 <histogram name="DevTools.BreakpointWithConditionAdded"
     enum="DevToolsBreakpointWithConditionAdded" expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>jarin@chromium.org</owner>
   <owner>kimanh@chromium.org</owner>
   <summary>
     Records when a breakpoint with a condition was added (logpoint or
     conditional breakpoint).
   </summary>
 </histogram>

 <histogram name="DevTools.CDPCommandFrom{ClientType}" enum="CDPCommands"
     expires_after="2023-12-16">
   <owner>wolfi@chromium.org</owner>
   <owner>dsv@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Records CDP command usage originating from {ClientType}. This is recorded
     whenever a CDP session receives and handles a command from a CDP client.
   </summary>
   <token key="ClientType">
     <variant name="DevTools"/>
     <variant name="Extension" summary="an extension"/>
     <variant name="Other" summary="other sources"/>
     <variant name="RemoteDebugger" summary="remote debugging"/>
   </token>
 </histogram>

 <histogram name="DevTools.ColorConvertedFrom" enum="DevToolsColorConvertedFrom"
     expires_after="2023-12-01">
   <owner>ergunsh@chromium.org</owner>
   <owner>changhaohan@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Records the color conversion menu usage.</summary>
 </histogram>

 <histogram name="DevTools.ColorPickerOpenedFrom"
     enum="DevToolsColorPickerOpenedFrom" expires_after="2023-12-01">
   <owner>ergunsh@chromium.org</owner>
   <owner>changhaohan@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Records the color picker usage.</summary>
 </histogram>

 <histogram name="DevTools.CSSHintShown" enum="DevToolsCSSHintShown"
     expires_after="2023-10-15">
   <owner>changhaohan@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Records how many times different CSS hint types were shown in the Styles
     panel in DevTools. It's recorded when a hint icon is shown in the Styles
     panel.
   </summary>
 </histogram>

 <histogram name="DevTools.CSSPropertyDocumentation"
     enum="DevToolsCSSPropertyDocumentation" expires_after="2023-12-01">
   <owner>ergunsh@chromium.org</owner>
   <owner>changhaohan@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Records the CSS Property documentation usage and feature toggles.
   </summary>
 </histogram>

 <histogram name="DevTools.DeveloperResourceLoaded"
     enum="DevToolsDeveloperResourceLoaded" expires_after="2023-10-22">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Records for each developer resource load that the DevTools front-end issues
     (e.g. to load a source map) several enum values encoding which load method
     was used, whether a fallback was used (and why), and whether the method
     succeeded or not.

     Some explanations to make sense of the enum values:

     LoadsThroughPage = LoadThroughPageViaTarget + LoadThroughPageViaFrame

     SuccessfulLoadsThroughPage = LoadsThroughPage - LoadThroughPageFailure

     LoadThroughPageFallback is the number of loads that can in principle be
     loaded through the page, but had to use the fallback because either loading
     through the page failed (LoadThroughPageFailure), or there was insufficient
     information to dispatch the load through the page; the number of such loads
     can be computed as LoadThroughPageFallback - LoadThroughPageFailure.

     The number of loads not eligible for loading through the page can be
     computed as FallbackPerOverride + FallbackPerProtocol, where
     FallbackPerOverride indicates loads where the DevTools user disabled loading
     through the page via an override, and FallbackPerProtocol indicates loads
     where DevTools could not load the resource via the page due to the
     resource's protocol scheme.

     The total number of loads that used the fallback can be computed as
     LoadThroughPageFallback + FallbackPerOverride + FallbackPerProtocol. Adding
     SuccessfulLoadsThroughPage to that number gives the total number of loads.
   </summary>
 </histogram>

 <histogram name="DevTools.DeveloperResourceScheme"
     enum="DevToolsDeveloperResourceScheme" expires_after="2023-10-22">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Records for each developer resource load that the DevTools front-end issues
     (e.g. to load a source map) one enum value that records the scheme of the
     resource's URL. For HTTP and HTTPS schemes, there are two enums each: One
     that signifies that the host was localhost, and one that signifies that it
     wasn't, i.e. to get the total number of resource loads using a HTTP scheme
     one must add the numbers of SchemeHttp and SchemeHttpLocalhost.

     The value SchemeUnknown signifies that parsing the scheme from the URL
     failed (note that at the point the enum is recorded, only absolute URLs
     arrive).
   </summary>
 </histogram>

 <histogram name="DevTools.ExperimentDisabled" enum="DevtoolsExperiments"
     expires_after="2023-10-22">
   <owner>yangguo@chromium.org</owner>
   <owner>changhao@chromium.org</owner>
   <summary>
     Fired when a devtools experiment is disabled from the experiments tab.
   </summary>
 </histogram>

 <histogram name="DevTools.ExperimentEnabled" enum="DevtoolsExperiments"
     expires_after="2023-10-22">
   <owner>yangguo@chromium.org</owner>
   <owner>changhao@chromium.org</owner>
   <summary>
     Fired when a devtools experiment is enabled from the experiments tab.
   </summary>
 </histogram>

 <histogram name="DevTools.ExperimentEnabledAtLaunch" enum="DevtoolsExperiments"
     expires_after="2023-10-22">
   <owner>yangguo@chromium.org</owner>
   <owner>changhao@chromium.org</owner>
   <summary>
     Fires for each experiment that is enabled at the time of Devtools Launch.
   </summary>
 </histogram>

 <histogram name="DevTools.InlineScriptParsed" enum="DevToolsVMInlineScriptType"
     expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>jarin@chromium.org</owner>
   <owner>kimanh@chromium.org</owner>
   <summary>Records the inline script types that are parsed.</summary>
 </histogram>

 <histogram name="DevTools.InspectElement" units="ms" expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Time to load Developer Tools when user clicks Inspect Element in the context
     menu.
   </summary>
 </histogram>

 <histogram name="DevTools.IssueCreated" enum="DevToolsIssueCreated"
     expires_after="2024-02-12">
   <owner>yangguo@chromium.org</owner>
   <owner>dsv@chromium.org</owner>
   <summary>
     Records the issue type when an issue is created for the Issues Panel.
   </summary>
 </histogram>

 <histogram name="DevTools.IssuesPanelIssueExpanded"
     enum="DevToolsIssuesPanelIssueExpanded" expires_after="2023-10-22">
   <owner>yangguo@chromium.org</owner>
   <owner>dsv@chromium.org</owner>
   <summary>
     Records which type of issue is expanded in the issues panel.
   </summary>
 </histogram>

 <histogram name="DevTools.IssuesPanelOpenedFrom"
     enum="DevToolsIssuesPanelOpenedFrom" expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>dsv@chromium.org</owner>
   <summary>
     Records which UI element is being used to open the Issues Panel.
   </summary>
 </histogram>

 <histogram name="DevTools.IssuesPanelResourceOpened"
     enum="DevToolsIssuesPanelResourceOpened" expires_after="2024-03-05">
   <owner>yangguo@chromium.org</owner>
   <owner>dsv@chromium.org</owner>
   <summary>
     Records which resource from what issue category is opened in the issue
     panel.
   </summary>
 </histogram>

 <histogram name="DevTools.KeybindSetSettingChanged" enum="DevToolsKeybindSets"
     expires_after="2023-04-16">
   <owner>yangguo@chromium.org</owner>
   <owner>jalyn@microsoft.com</owner>
   <owner>leo.lee@microsoft.com</owner>
   <summary>
     Recorded when the user changes which keyboard shortcut presets they are
     using in the DevTools.
   </summary>
 </histogram>

 <histogram name="DevTools.KeyboardShortcutFired"
     enum="DevToolsKeyboardShortcutAction" expires_after="2023-10-22">
   <owner>yangguo@chromium.org</owner>
   <owner>jalyn@microsoft.com</owner>
   <owner>leo.lee@microsoft.com</owner>
   <summary>
     Recorded when a DevTools keyboard shortcut has been processed and
     successfully executed its action.
   </summary>
 </histogram>

 <histogram name="DevTools.Language" enum="DevToolsLanguage"
     expires_after="2023-12-01">
   <owner>bmeurer@chromium.org</owner>
   <owner>szuend@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     The actual display language used for the DevTools UI. Logged once per
     DevTools session when DevTools is booted up.
   </summary>
 </histogram>

 <histogram base="true" name="DevTools.Launch" units="ms"
     expires_after="2023-08-27">
 <!-- Name completed by histogram_suffixes name="DevToolsLaunchPanels" -->

   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Measures the time until a given tool is interactive during a cold start of
     DevTools.
   </summary>
 </histogram>

 <histogram name="DevTools.LighthouseModeRun" enum="DevToolsLighthouseModeRun"
     expires_after="2023-12-01">
   <owner>asraine@chromium.org</owner>
   <owner>paulirish@chromium.org</owner>
   <owner>cjamcl@chromium.org</owner>
   <summary>Records which Lighthouse mode was used to audit the page.</summary>
 </histogram>

 <histogram name="DevTools.LinearMemoryInspector.RevealedFrom"
     enum="DevToolsLinearMemoryInspectorRevealedFrom" expires_after="2024-03-01">
   <owner>bmeurer@chromium.org</owner>
   <owner>kimanh@chromium.org</owner>
   <summary>
     Records the ways in which the Memory Inspector panel was opened.
   </summary>
 </histogram>

 <histogram name="DevTools.LinearMemoryInspector.Target"
     enum="DevToolsLinearMemoryInspectorTarget" expires_after="2024-03-01">
   <owner>bmeurer@chromium.org</owner>
   <owner>kimanh@chromium.org</owner>
   <summary>
     Records the inspection target via which the Memory Inspector was opened.
   </summary>
 </histogram>

 <histogram name="DevTools.ManifestSectionSelected"
     enum="DevToolsManifestSection" expires_after="2022-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>edgedevtools@microsoft.com</owner>
   <summary>
     Records when certain items of the Manifest dropdown submenu in the
     Application Tool are selected.
   </summary>
 </histogram>

 <histogram name="DevTools.NetworkPanelResponsePreviewOpened"
     enum="DevToolsMediaType" expires_after="2023-12-31">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Records the media types of files opened in the DevTools Network panel
     response preview.
   </summary>
 </histogram>

 <histogram name="DevTools.OpenedByAction" enum="DevToolsOpenedByAction"
     expires_after="2023-12-01">
   <owner>changhaohan@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <summary>
     Recorded when a particular action was taken to launch DevTools.
   </summary>
 </histogram>

 <histogram name="DevTools.PanelClosed" enum="DevToolsPanel"
     expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Specified DevTools panel was closed. Fires immediately after closing a panel
     using the &quot;x&quot; button in the panel title.
   </summary>
 </histogram>

 <histogram name="DevTools.PanelShown" enum="DevToolsPanel"
     expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>Specified DevTools panel was shown.</summary>
 </histogram>

 <histogram name="DevTools.RecordingAssertion" enum="DevToolsRecordingAssertion"
     expires_after="2024-03-13">
   <owner>jrandolf@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Recorded when assertions are used/edited</summary>
 </histogram>

 <histogram name="DevTools.RecordingCodeToggled"
     enum="DevToolsRecordingCodeToggled" expires_after="2024-01-10">
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Recorded when the code view for a recording was toggled in Recorder panel.
   </summary>
 </histogram>

 <histogram name="DevTools.RecordingCopiedToClipboard"
     enum="DevToolsRecordingCopiedToClipboard" expires_after="2024-01-10">
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Recorded when user copies a recording or step to clipboard in Recorder
     panel.
   </summary>
 </histogram>

 <histogram name="DevTools.RecordingEdited" enum="DevToolsRecordingEdited"
     expires_after="2023-09-03">
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Recorded when a recording is being edited by the user.</summary>
 </histogram>

 <histogram name="DevTools.RecordingExported" enum="DevToolsRecordingExported"
     expires_after="2023-09-03">
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Recorded when a recording is exported.</summary>
 </histogram>

 <histogram name="DevTools.RecordingReplayFinished"
     enum="DevToolsRecordingReplayFinished" expires_after="2023-10-22">
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Recorded when a replay is over.</summary>
 </histogram>

 <histogram name="DevTools.RecordingReplaySpeed"
     enum="DevToolsRecordingReplaySpeed" expires_after="2023-09-03">
   <owner>ergunsh@chromium.org</owner>
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Recorded when a recording is being replayed. Used to count number of times
     replay started with which speed.
   </summary>
 </histogram>

 <histogram name="DevTools.RecordingReplayStarted"
     enum="DevToolsRecordingReplayStarted" expires_after="2023-10-22">
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Recorded when a recording is being replayed.</summary>
 </histogram>

 <histogram name="DevTools.RecordingToggled" enum="DevToolsRecordingToggled"
     expires_after="2023-10-22">
   <owner>alexrudenko@chromium.org</owner>
   <owner>mathias@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Recorded when a recording is started or finished in the Recorder panel.
   </summary>
 </histogram>

 <histogram name="DevTools.SidebarPaneShown" enum="DevToolsSidebarPane"
     expires_after="2023-08-08">
   <owner>changhaohan@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>Specified DevTools sidebar pane was shown.</summary>
 </histogram>

 <histogram name="DevTools.SourcesPanelFileDebugged" enum="DevToolsMediaType"
     expires_after="2023-12-31">
   <owner>bmeurer@chromium.org</owner>
   <owner>szuend@chromium.org</owner>
   <summary>
     Records the media types of files debugged in the DevTools Sources panel.
     This means the user eiter sets a breakpoint, pauses or steps in a file of
     the recorded media type.
   </summary>
 </histogram>

 <histogram name="DevTools.SourcesPanelFileOpened" enum="DevToolsMediaType"
     expires_after="2023-12-31">
   <owner>yangguo@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <summary>
     Records the media types of files opened in the DevTools Sources panel.
   </summary>
 </histogram>

 <histogram name="DevTools.StyleTextCopied" enum="DevToolsStyleTextCopied"
     expires_after="2023-12-31">
   <owner>changhaohan@chromium.org</owner>
   <owner>bmeurer@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>Recorded when certain style text is copied in DevTools.</summary>
 </histogram>

 <histogram name="DevTools.SyncSetting" enum="DevToolsSyncSetting"
     expires_after="2023-12-01">
   <owner>bmeurer@chromium.org</owner>
   <owner>szuend@chromium.org</owner>
   <owner>yangguo@chromium.org</owner>
   <summary>
     Records whether syncing DevTools settings via Chrome Sync is enabled or why
     it's disabled. Logged once per DevTools session when DevTools is booted up.
   </summary>
 </histogram>

 <histogram name="DevTools.VMInlineScriptShown"
     enum="DevToolsVMInlineScriptType" expires_after="2023-12-01">
   <owner>yangguo@chromium.org</owner>
   <owner>jarin@chromium.org</owner>
   <owner>kimanh@chromium.org</owner>
   <summary>
     Records the inline script types for which we show the VM script instead of
     the HTML resource.
   </summary>
 </histogram>

 </histograms>

 </histogram-configuration>
	<!--
	Copyright 2020 The Chromium Authors
	Use of this source code is governed by a BSD-style license that can be
	found in the LICENSE file.
	-->

	<!--
	This file is used to generate a comprehensive list of Dev histograms
	along with a detailed description for each histogram.

	For best practices on writing histogram descriptions, see
	https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md

	Please follow the instructions in the OWNERS file in this directory to find a
	reviewer. If no OWNERS file exists, please consider signing up at
	go/reviewing-metrics (Googlers only), as all subdirectories are expected to
	have an OWNERS file. As a last resort you can send the CL to
	chromium-metrics-reviews@google.com.
	-->

	<histogram-configuration>

	<histograms>

	<histogram name="DevTools.ActionTaken" enum="DevToolsAction"
	expires_after="2023-10-22">
	<owner>alph@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>Specified DevTools action has been taken.</summary>
	</histogram>

	<histogram name="DevTools.BreakpointEditDialogRevealedFrom"
	enum="DevToolsBreakpointEditDialogRevealedFrom" expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>jarin@chromium.org</owner>
	<owner>kimanh@chromium.org</owner>
	<summary>
	Records the ways in which the Breakpoint Edit Dialog was opened.
	</summary>
	</histogram>

	<histogram name="DevTools.BreakpointsRestoredFromStorageCount"
	enum="DevToolsBreakpointsRestoredFromStorageCount"
	expires_after="2024-03-01">
	<owner>jarin@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Records the number of breakpoints restored from the storage. The breakpoint
	count is restored when the debugger is initialized.
	</summary>
	</histogram>

	<histogram name="DevTools.BreakpointWithConditionAdded"
	enum="DevToolsBreakpointWithConditionAdded" expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>jarin@chromium.org</owner>
	<owner>kimanh@chromium.org</owner>
	<summary>
	Records when a breakpoint with a condition was added (logpoint or
	conditional breakpoint).
	</summary>
	</histogram>

	<histogram name="DevTools.CDPCommandFrom{ClientType}" enum="CDPCommands"
	expires_after="2023-12-16">
	<owner>wolfi@chromium.org</owner>
	<owner>dsv@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Records CDP command usage originating from {ClientType}. This is recorded
	whenever a CDP session receives and handles a command from a CDP client.
	</summary>
	<token key="ClientType">
	<variant name="DevTools"/>
	<variant name="Extension" summary="an extension"/>
	<variant name="Other" summary="other sources"/>
	<variant name="RemoteDebugger" summary="remote debugging"/>
	</token>
	</histogram>

	<histogram name="DevTools.ColorConvertedFrom" enum="DevToolsColorConvertedFrom"
	expires_after="2023-12-01">
	<owner>ergunsh@chromium.org</owner>
	<owner>changhaohan@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Records the color conversion menu usage.</summary>
	</histogram>

	<histogram name="DevTools.ColorPickerOpenedFrom"
	enum="DevToolsColorPickerOpenedFrom" expires_after="2023-12-01">
	<owner>ergunsh@chromium.org</owner>
	<owner>changhaohan@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Records the color picker usage.</summary>
	</histogram>

	<histogram name="DevTools.CSSHintShown" enum="DevToolsCSSHintShown"
	expires_after="2023-10-15">
	<owner>changhaohan@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Records how many times different CSS hint types were shown in the Styles
	panel in DevTools. It's recorded when a hint icon is shown in the Styles
	panel.
	</summary>
	</histogram>

	<histogram name="DevTools.CSSPropertyDocumentation"
	enum="DevToolsCSSPropertyDocumentation" expires_after="2023-12-01">
	<owner>ergunsh@chromium.org</owner>
	<owner>changhaohan@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Records the CSS Property documentation usage and feature toggles.
	</summary>
	</histogram>

	<histogram name="DevTools.DeveloperResourceLoaded"
	enum="DevToolsDeveloperResourceLoaded" expires_after="2023-10-22">
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Records for each developer resource load that the DevTools front-end issues
	(e.g. to load a source map) several enum values encoding which load method
	was used, whether a fallback was used (and why), and whether the method
	succeeded or not.

	Some explanations to make sense of the enum values:

	LoadsThroughPage = LoadThroughPageViaTarget + LoadThroughPageViaFrame

	SuccessfulLoadsThroughPage = LoadsThroughPage - LoadThroughPageFailure

	LoadThroughPageFallback is the number of loads that can in principle be
	loaded through the page, but had to use the fallback because either loading
	through the page failed (LoadThroughPageFailure), or there was insufficient
	information to dispatch the load through the page; the number of such loads
	can be computed as LoadThroughPageFallback - LoadThroughPageFailure.

	The number of loads not eligible for loading through the page can be
	computed as FallbackPerOverride + FallbackPerProtocol, where
	FallbackPerOverride indicates loads where the DevTools user disabled loading
	through the page via an override, and FallbackPerProtocol indicates loads
	where DevTools could not load the resource via the page due to the
	resource's protocol scheme.

	The total number of loads that used the fallback can be computed as
	LoadThroughPageFallback + FallbackPerOverride + FallbackPerProtocol. Adding
	SuccessfulLoadsThroughPage to that number gives the total number of loads.
	</summary>
	</histogram>

	<histogram name="DevTools.DeveloperResourceScheme"
	enum="DevToolsDeveloperResourceScheme" expires_after="2023-10-22">
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Records for each developer resource load that the DevTools front-end issues
	(e.g. to load a source map) one enum value that records the scheme of the
	resource's URL. For HTTP and HTTPS schemes, there are two enums each: One
	that signifies that the host was localhost, and one that signifies that it
	wasn't, i.e. to get the total number of resource loads using a HTTP scheme
	one must add the numbers of SchemeHttp and SchemeHttpLocalhost.

	The value SchemeUnknown signifies that parsing the scheme from the URL
	failed (note that at the point the enum is recorded, only absolute URLs
	arrive).
	</summary>
	</histogram>

	<histogram name="DevTools.ExperimentDisabled" enum="DevtoolsExperiments"
	expires_after="2023-10-22">
	<owner>yangguo@chromium.org</owner>
	<owner>changhao@chromium.org</owner>
	<summary>
	Fired when a devtools experiment is disabled from the experiments tab.
	</summary>
	</histogram>

	<histogram name="DevTools.ExperimentEnabled" enum="DevtoolsExperiments"
	expires_after="2023-10-22">
	<owner>yangguo@chromium.org</owner>
	<owner>changhao@chromium.org</owner>
	<summary>
	Fired when a devtools experiment is enabled from the experiments tab.
	</summary>
	</histogram>

	<histogram name="DevTools.ExperimentEnabledAtLaunch" enum="DevtoolsExperiments"
	expires_after="2023-10-22">
	<owner>yangguo@chromium.org</owner>
	<owner>changhao@chromium.org</owner>
	<summary>
	Fires for each experiment that is enabled at the time of Devtools Launch.
	</summary>
	</histogram>

	<histogram name="DevTools.InlineScriptParsed" enum="DevToolsVMInlineScriptType"
	expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>jarin@chromium.org</owner>
	<owner>kimanh@chromium.org</owner>
	<summary>Records the inline script types that are parsed.</summary>
	</histogram>

	<histogram name="DevTools.InspectElement" units="ms" expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Time to load Developer Tools when user clicks Inspect Element in the context
	menu.
	</summary>
	</histogram>

	<histogram name="DevTools.IssueCreated" enum="DevToolsIssueCreated"
	expires_after="2024-02-12">
	<owner>yangguo@chromium.org</owner>
	<owner>dsv@chromium.org</owner>
	<summary>
	Records the issue type when an issue is created for the Issues Panel.
	</summary>
	</histogram>

	<histogram name="DevTools.IssuesPanelIssueExpanded"
	enum="DevToolsIssuesPanelIssueExpanded" expires_after="2023-10-22">
	<owner>yangguo@chromium.org</owner>
	<owner>dsv@chromium.org</owner>
	<summary>
	Records which type of issue is expanded in the issues panel.
	</summary>
	</histogram>

	<histogram name="DevTools.IssuesPanelOpenedFrom"
	enum="DevToolsIssuesPanelOpenedFrom" expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>dsv@chromium.org</owner>
	<summary>
	Records which UI element is being used to open the Issues Panel.
	</summary>
	</histogram>

	<histogram name="DevTools.IssuesPanelResourceOpened"
	enum="DevToolsIssuesPanelResourceOpened" expires_after="2024-03-05">
	<owner>yangguo@chromium.org</owner>
	<owner>dsv@chromium.org</owner>
	<summary>
	Records which resource from what issue category is opened in the issue
	panel.
	</summary>
	</histogram>

	<histogram name="DevTools.KeybindSetSettingChanged" enum="DevToolsKeybindSets"
	expires_after="2023-04-16">
	<owner>yangguo@chromium.org</owner>
	<owner>jalyn@microsoft.com</owner>
	<owner>leo.lee@microsoft.com</owner>
	<summary>
	Recorded when the user changes which keyboard shortcut presets they are
	using in the DevTools.
	</summary>
	</histogram>

	<histogram name="DevTools.KeyboardShortcutFired"
	enum="DevToolsKeyboardShortcutAction" expires_after="2023-10-22">
	<owner>yangguo@chromium.org</owner>
	<owner>jalyn@microsoft.com</owner>
	<owner>leo.lee@microsoft.com</owner>
	<summary>
	Recorded when a DevTools keyboard shortcut has been processed and
	successfully executed its action.
	</summary>
	</histogram>

	<histogram name="DevTools.Language" enum="DevToolsLanguage"
	expires_after="2023-12-01">
	<owner>bmeurer@chromium.org</owner>
	<owner>szuend@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	The actual display language used for the DevTools UI. Logged once per
	DevTools session when DevTools is booted up.
	</summary>
	</histogram>

	<histogram base="true" name="DevTools.Launch" units="ms"
	expires_after="2023-08-27">
	<!-- Name completed by histogram_suffixes name="DevToolsLaunchPanels" -->

	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Measures the time until a given tool is interactive during a cold start of
	DevTools.
	</summary>
	</histogram>

	<histogram name="DevTools.LighthouseModeRun" enum="DevToolsLighthouseModeRun"
	expires_after="2023-12-01">
	<owner>asraine@chromium.org</owner>
	<owner>paulirish@chromium.org</owner>
	<owner>cjamcl@chromium.org</owner>
	<summary>Records which Lighthouse mode was used to audit the page.</summary>
	</histogram>

	<histogram name="DevTools.LinearMemoryInspector.RevealedFrom"
	enum="DevToolsLinearMemoryInspectorRevealedFrom" expires_after="2024-03-01">
	<owner>bmeurer@chromium.org</owner>
	<owner>kimanh@chromium.org</owner>
	<summary>
	Records the ways in which the Memory Inspector panel was opened.
	</summary>
	</histogram>

	<histogram name="DevTools.LinearMemoryInspector.Target"
	enum="DevToolsLinearMemoryInspectorTarget" expires_after="2024-03-01">
	<owner>bmeurer@chromium.org</owner>
	<owner>kimanh@chromium.org</owner>
	<summary>
	Records the inspection target via which the Memory Inspector was opened.
	</summary>
	</histogram>

	<histogram name="DevTools.ManifestSectionSelected"
	enum="DevToolsManifestSection" expires_after="2022-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>edgedevtools@microsoft.com</owner>
	<summary>
	Records when certain items of the Manifest dropdown submenu in the
	Application Tool are selected.
	</summary>
	</histogram>

	<histogram name="DevTools.NetworkPanelResponsePreviewOpened"
	enum="DevToolsMediaType" expires_after="2023-12-31">
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Records the media types of files opened in the DevTools Network panel
	response preview.
	</summary>
	</histogram>

	<histogram name="DevTools.OpenedByAction" enum="DevToolsOpenedByAction"
	expires_after="2023-12-01">
	<owner>changhaohan@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<summary>
	Recorded when a particular action was taken to launch DevTools.
	</summary>
	</histogram>

	<histogram name="DevTools.PanelClosed" enum="DevToolsPanel"
	expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Specified DevTools panel was closed. Fires immediately after closing a panel
	using the "x" button in the panel title.
	</summary>
	</histogram>

	<histogram name="DevTools.PanelShown" enum="DevToolsPanel"
	expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>Specified DevTools panel was shown.</summary>
	</histogram>

	<histogram name="DevTools.RecordingAssertion" enum="DevToolsRecordingAssertion"
	expires_after="2024-03-13">
	<owner>jrandolf@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Recorded when assertions are used/edited</summary>
	</histogram>

	<histogram name="DevTools.RecordingCodeToggled"
	enum="DevToolsRecordingCodeToggled" expires_after="2024-01-10">
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Recorded when the code view for a recording was toggled in Recorder panel.
	</summary>
	</histogram>

	<histogram name="DevTools.RecordingCopiedToClipboard"
	enum="DevToolsRecordingCopiedToClipboard" expires_after="2024-01-10">
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Recorded when user copies a recording or step to clipboard in Recorder
	panel.
	</summary>
	</histogram>

	<histogram name="DevTools.RecordingEdited" enum="DevToolsRecordingEdited"
	expires_after="2023-09-03">
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Recorded when a recording is being edited by the user.</summary>
	</histogram>

	<histogram name="DevTools.RecordingExported" enum="DevToolsRecordingExported"
	expires_after="2023-09-03">
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Recorded when a recording is exported.</summary>
	</histogram>

	<histogram name="DevTools.RecordingReplayFinished"
	enum="DevToolsRecordingReplayFinished" expires_after="2023-10-22">
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Recorded when a replay is over.</summary>
	</histogram>

	<histogram name="DevTools.RecordingReplaySpeed"
	enum="DevToolsRecordingReplaySpeed" expires_after="2023-09-03">
	<owner>ergunsh@chromium.org</owner>
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Recorded when a recording is being replayed. Used to count number of times
	replay started with which speed.
	</summary>
	</histogram>

	<histogram name="DevTools.RecordingReplayStarted"
	enum="DevToolsRecordingReplayStarted" expires_after="2023-10-22">
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Recorded when a recording is being replayed.</summary>
	</histogram>

	<histogram name="DevTools.RecordingToggled" enum="DevToolsRecordingToggled"
	expires_after="2023-10-22">
	<owner>alexrudenko@chromium.org</owner>
	<owner>mathias@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Recorded when a recording is started or finished in the Recorder panel.
	</summary>
	</histogram>

	<histogram name="DevTools.SidebarPaneShown" enum="DevToolsSidebarPane"
	expires_after="2023-08-08">
	<owner>changhaohan@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>Specified DevTools sidebar pane was shown.</summary>
	</histogram>

	<histogram name="DevTools.SourcesPanelFileDebugged" enum="DevToolsMediaType"
	expires_after="2023-12-31">
	<owner>bmeurer@chromium.org</owner>
	<owner>szuend@chromium.org</owner>
	<summary>
	Records the media types of files debugged in the DevTools Sources panel.
	This means the user eiter sets a breakpoint, pauses or steps in a file of
	the recorded media type.
	</summary>
	</histogram>

	<histogram name="DevTools.SourcesPanelFileOpened" enum="DevToolsMediaType"
	expires_after="2023-12-31">
	<owner>yangguo@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<summary>
	Records the media types of files opened in the DevTools Sources panel.
	</summary>
	</histogram>

	<histogram name="DevTools.StyleTextCopied" enum="DevToolsStyleTextCopied"
	expires_after="2023-12-31">
	<owner>changhaohan@chromium.org</owner>
	<owner>bmeurer@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>Recorded when certain style text is copied in DevTools.</summary>
	</histogram>

	<histogram name="DevTools.SyncSetting" enum="DevToolsSyncSetting"
	expires_after="2023-12-01">
	<owner>bmeurer@chromium.org</owner>
	<owner>szuend@chromium.org</owner>
	<owner>yangguo@chromium.org</owner>
	<summary>
	Records whether syncing DevTools settings via Chrome Sync is enabled or why
	it's disabled. Logged once per DevTools session when DevTools is booted up.
	</summary>
	</histogram>

	<histogram name="DevTools.VMInlineScriptShown"
	enum="DevToolsVMInlineScriptType" expires_after="2023-12-01">
	<owner>yangguo@chromium.org</owner>
	<owner>jarin@chromium.org</owner>
	<owner>kimanh@chromium.org</owner>
	<summary>
	Records the inline script types for which we show the VM script instead of
	the HTML resource.
	</summary>
	</histogram>

	</histograms>

	</histogram-configuration>