[Android] Add animation frame time histogram class.

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 e0170686e3ae279e158a0d2ecd54119b4fbb51e1..c50527873f31c9b3f66661998f3971e1d033453c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -43455,6 +43455,11 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>Number of times that each menu item is clicked.</summary>
 </histogram>
 
+<histogram name="WrenchMenu.OpeningAnimationFrameTimes" units="milliseconds">
+  <owner>kkimlabs@chromium.org</owner>
+  <summary>Frame times of Android wrench menu opening animation.</summary>

[Ilya Sherman, 2015/02/24 05:28:51]

This description is not very clear.  Could you please clarify what exactly this
is measuring?  What are the start and end times in this metric?  Are there
multiple different start+end time combinations being measured?

[Kibeom Kim (inactive), 2015/02/24 18:25:54]

Done.

+</histogram>
+
 <histogram name="WrenchMenu.RecentTabsSubMenu" enum="RecentTabsAction">
   <owner>rpop@chromium.org</owner>
   <summary>
@@ -43472,7 +43477,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 </histogram>
 
 <histogram name="WrenchMenu.TouchDuration" units="milliseconds">
-  <owner>kkimlabs@google.com</owner>
+  <owner>kkimlabs@chromium.org</owner>
   <summary>
     Time difference between touch down and touch up on Android wrench button.
   </summary>