Open source WebCore.FeatureObserver histogram

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index bb3cd6fb9efd38d9bbe73ec4dd7bff3a668f3a9b..a7afabaefb6579094517cc8277d70c63c66881e6 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -9692,6 +9692,14 @@ other types of suffix sets.
   </summary>
 </histogram>
 
+<histogram name="WebCore.FeatureObserver" enum="FeatureObserver">
+  <summary>
+    Count of how many instances of WebCore::Page use various features. See
+    http://src.chromium.org/viewvc/blink/trunk/Source/core/page/UseCounter.h for

[Alexei Svitkine (slow), 2013/05/31 13:57:39]

Is it me, or is there no actual descriptions of the items in that file, just in
the names?

In that case, it's as good as the enum entry here already, so need to link to
it. (Or least, maybe not say "for descriptions").

[tyoshino (SeeGerritForStatus), 2013/06/03 05:01:55]

Removed.

+    description of each enum value.
+  </summary>
+</histogram>
+
 <histogram name="WebCore.IndexedDB.BackingStore.ConsistencyError"
     enum="IDBLevelDBBackingStoreInternalErrorType">
   <summary>
@@ -11831,6 +11839,89 @@ other types of suffix sets.
   <int value="3" label="FALLBACK_TLS1_1">Fell back on TLS 1.1.</int>
 </enum>
 
+<enum name="FeatureObserver" type="int">

[Alexei Svitkine (slow), 2013/05/31 13:57:39]

Perhaps mention
http://src.chromium.org/viewvc/blink/trunk/Source/core/page/UseCounter.h here
instead with a comment?

[tyoshino (SeeGerritForStatus), 2013/06/03 05:01:55]

Done.

+  <int value="0" label="PageDestruction"/>
+  <int value="1" label="LegacyNotifications"/>
+  <int value="2" label="MultipartMainResource"/>
+  <int value="3" label="PrefixedIndexedDB"/>
+  <int value="4" label="WorkerStart"/>
+  <int value="5" label="SharedWorkerStart"/>
+  <int value="6" label="LegacyWebAudioNoteOn"/>
+  <int value="7" label="WebAudioStart"/>
+  <int value="8" label="PrefixedContentSecurityPolicy"/>
+  <int value="9" label="UnprefixedIndexedDB"/>
+  <int value="10" label="OpenWebDatabase"/>
+  <int value="11" label="LegacyHTMLNotifications"/>
+  <int value="12" label="LegacyTextNotifications"/>
+  <int value="13" label="UnprefixedRequestAnimationFrame"/>
+  <int value="14" label="PrefixedRequestAnimationFrame"/>
+  <int value="15" label="ContentSecurityPolicy"/>
+  <int value="16" label="ContentSecurityPolicyReportOnly"/>
+  <int value="17" label="PrefixedContentSecurityPolicyReportOnly"/>
+  <int value="18" label="PrefixedTransitionEndEvent"/>
+  <int value="19" label="UnprefixedTransitionEndEvent"/>
+  <int value="20" label="PrefixedAndUnprefixedTransitionEndEvent"/>
+  <int value="21" label="AutoFocusAttribute"/>
+  <int value="22" label="DeprecatedAutoSaveAttribute"/>
+  <int value="23" label="DataListElement"/>
+  <int value="24" label="FormAttribute"/>
+  <int value="25" label="IncrementalAttribute"/>
+  <int value="26" label="InputTypeColor"/>
+  <int value="27" label="InputTypeDate"/>
+  <int value="28" label="InputTypeDateTime"/>
+  <int value="29" label="InputTypeDateTimeFallback"/>
+  <int value="30" label="InputTypeDateTimeLocal"/>
+  <int value="31" label="InputTypeEmail"/>
+  <int value="32" label="InputTypeMonth"/>
+  <int value="33" label="InputTypeNumber"/>
+  <int value="34" label="InputTypeRange"/>
+  <int value="35" label="InputTypeSearch"/>
+  <int value="36" label="InputTypeTel"/>
+  <int value="37" label="InputTypeTime"/>
+  <int value="38" label="InputTypeURL"/>
+  <int value="39" label="InputTypeWeek"/>
+  <int value="40" label="InputTypeWeekFallback"/>
+  <int value="41" label="ListAttribute"/>
+  <int value="42" label="MaxAttribute"/>
+  <int value="43" label="MinAttribute"/>
+  <int value="44" label="PatternAttribute"/>
+  <int value="45" label="PlaceholderAttribute"/>
+  <int value="46" label="PrecisionAttribute"/>
+  <int value="47" label="PrefixedDirectoryAttribute"/>
+  <int value="48" label="PrefixedSpeechAttribute"/>
+  <int value="49" label="RequiredAttribute"/>
+  <int value="50" label="ResultsAttribute"/>
+  <int value="51" label="StepAttribute"/>
+  <int value="52" label="PageVisits"/>
+  <int value="53" label="HTMLMarqueeElement"/>
+  <int value="54" label="CSSOverflowMarquee"/>
+  <int value="55" label="Reflection"/>
+  <int value="56" label="CursorVisibility"/>
+  <int value="57" label="StorageInfo"/>
+  <int value="58" label="XFrameOptions"/>
+  <int value="59" label="XFrameOptionsSameOrigin"/>
+  <int value="60" label="XFrameOptionsSameOriginWithBadAncestorChain"/>
+  <int value="61" label="DeprecatedFlexboxWebContent"/>
+  <int value="62" label="DeprecatedFlexboxChrome"/>
+  <int value="63" label="DeprecatedFlexboxChromeExtension"/>
+  <int value="64" label="SVGTRefElement"/>
+  <int value="65" label="UnprefixedPerformanceTimeline"/>
+  <int value="66" label="PrefixedPerformanceTimeline"/>
+  <int value="67" label="UnprefixedUserTiming"/>
+  <int value="68" label="PrefixedUserTiming"/>
+  <int value="69" label="WindowEvent"/>
+  <int value="70" label="ContentSecurityPolicyWithBaseElement"/>
+  <int value="71" label="PrefixedMediaAddKey"/>
+  <int value="72" label="PrefixedMediaGenerateKeyRequest"/>
+  <int value="73" label="WebAudioLooping"/>
+  <int value="74" label="DocumentClear"/>
+  <int value="75" label="PrefixedTransitionMediaFeature"/>
+  <int value="76" label="SVGFontElement"/>
+  <int value="77" label="XMLDocument"/>
+  <int value="78" label="XSLProcessingInstruction"/>
+  <int value="79" label="XSLTProcessor"/>
+</enum>
+
 <enum name="FFmpegCodecs" type="int">
   <int value="0" label="NONE"/>
   <int value="1" label="MPEG1VIDEO"/>