Update histogram's names for ChromeArcVideoDecodeAccelerator.

tools/metrics/histograms/enums.xml

Index: tools/metrics/histograms/enums.xml
diff --git a/tools/metrics/histograms/enums.xml b/tools/metrics/histograms/enums.xml
index 1bf8fe4555b7a14c098a11f51c02db25065671e7..8be9a30ff613ede4cdd3935704e51f90568a6e96 100644
--- a/tools/metrics/histograms/enums.xml
+++ b/tools/metrics/histograms/enums.xml
@@ -1222,7 +1222,7 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="19" label="Network is unavailable"/>
 </enum>
 
-<enum name="ArcVideoAcceleratorResult" type="int">
+<enum name="ArcVideoAcceleratorResultObsolete" type="int">
   <summary>Defines ArcVideoAccelerator initialization status</summary>
   <int value="0" label="SUCCESS"/>
   <int value="1" label="ILLEGAL_STATE"/>
@@ -1232,6 +1232,16 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="5" label="INSUFFICIENT_RESOURCES"/>
 </enum>
 
+<enum name="ArcVideoDecodeAcceleratorResult" type="int">
+  <summary>Defines ArcVideoDecodeAccelerator initialization status</summary>
+  <int value="0" label="SUCCESS"/>
+  <int value="1" label="ILLEGAL_STATE"/>
+  <int value="2" label="INVALID_ARGUMENT"/>
+  <int value="3" label="UNREADABLE_INPUT"/>
+  <int value="4" label="PLATFORM_FAILURE"/>
+  <int value="5" label="INSUFFICIENT_RESOURCES"/>
+</enum>

[Ilya Sherman, 2017/06/12 20:08:26]

Hmm, why are you renaming this enum?  It seems identical to the obsoleted one --
am I missing something?

+
 <enum name="AsyncDNSConfigParsePosix" type="int">
   <int value="0" label="OK"/>
   <int value="1" label="RES_INIT_FAILED"/>