Add Media.ArcGpuVideoDecodeAccelerator.InitializeResult to histograms

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 2e41f9cd4cc1a6b165dfca9e1783e971405a2363..ccce5ef353e282611d843194ff57c4c180758a36 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -23055,6 +23055,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.ArcGpuVideoDecodeAccelerator.InitializeResult"
+    enum="ArcVideoAcceleratorResult">
+  <owner>johnylin@chromium.org</owner>
+  <summary>
+    Counts of status values returned from calls to
+    ArcGpuVideoDecodeAccelerator::Initialize().
+  </summary>
+</histogram>
+
 <histogram name="Media.Audible.ConcurrentTabsTime" units="ms">
   <owner>mlamouri@chromium.org</owner>
   <summary>
@@ -74427,6 +74436,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="17" label="Overall sign in timeout"/>
 </enum>
 
+<enum name="ArcVideoAcceleratorResult" type="int">
+  <summary>Defines ArcVideoAccelerator 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>
+
 <enum name="AsyncDNSConfigParsePosix" type="int">
   <int value="0" label="OK"/>
   <int value="1" label="RES_INIT_FAILED"/>