Remove webkitAudoContext and webkitOfflineAudioContext

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 b54eb0246e80b5fdebde20ed28ff8b26e1cd4ea8..75a35a2db643c031e1c523c17163d4b2d7db73b4 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -87590,6 +87590,8 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="1696" label="FullscreenAllowedByOrientationChange"/>
   <int value="1697"
       label="ServiceWorkerRespondToNavigationRequestWithRedirectedResponse"/>
+  <int value="1698" label="V8AudioContext_Constructor"/>
+  <int value="1699" label="V8OfflineAudioContext_Constructor"/>
 </enum>

[tkent, 2016/12/14 22:52:49]

Add OBSOLETE_ prefixes to 652-655?

[foolip, 2016/12/14 23:32:01]

Huh, I didn't know people were doing this, but I see
OBSOLETE_FormSubmissionNotInDocumentTree. Could the update script be taught to
do this automatically?

[Raymond Toy, 2016/12/14 23:53:13]

That would be awesome, but I'm doing this manually now.

(I've often wished that the update script ran automatically so I don't have to. 
But that's a different issue.)

 
 <enum name="FetchRequestMode" type="int">