Open source WebCore.FeatureObserver histogram

tools/metrics/histograms/histograms.xml

 <!--
 Copyright 2013 The Chromium Authors. All rights reserved.
 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 Chrome histograms along
 with a detailed description for each histogram.
 
@@ skipping 9674 matching lines @@
   </summary>
 </histogram>
 
 <histogram name="Wallet.ApiCallDuration.UpdateInstrument" units="ms">
   <summary>
     Measures the time taken by Google Online Wallet server's update instument
     API call.
   </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>
     Methods that encountered consistency errors. Such errors probably point to a
     bug in our code.
   </summary>
 </histogram>
 
 <histogram name="WebCore.IndexedDB.BackingStore.InternalError"
     enum="IDBLevelDBBackingStoreInternalErrorType">
@@ skipping 2119 matching lines @@
   <int value="3" label="Unfused; lot ID NZVR7"/>
 </enum>
 
 <enum name="FallbackSSLVersion" type="int">
   <int value="0" label="FALLBACK_NONE">SSL version fallback did not occur.</int>
   <int value="1" label="FALLBACK_SSL3">Fell back on SSL 3.0.</int>
   <int value="2" label="FALLBACK_TLS1">Fell back on TLS 1.0.</int>
   <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"/>
   <int value="2" label="MPEG2VIDEO"/>
   <int value="3" label="MPEG2VIDEO_XVMC"/>
   <int value="4" label="H261"/>
   <int value="5" label="H263"/>
   <int value="6" label="RV10"/>
   <int value="7" label="RV20"/>
   <int value="8" label="MJPEG"/>
@@ skipping 4749 matching lines @@
 <fieldtrial name="SSLResumption">
   <group name="Resume_Handshake" label="Session Resumption"/>
   <group name="Full_Handshake" label="Full"/>
   <affected-histogram name="Net.SSL_Connection_Latency"/>
   <affected-histogram name="Net.SSL_Connection_Latency_Google"/>
 </fieldtrial>
 
 </fieldtrials>
 
 </histogram-configuration>