Introduce moderate binding

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 57daa7befac55f5d60833ee420c28fd6291f8934..71024f8b12406e7f90a6a60a3058634b480a8eea 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -16994,6 +16994,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="MobileBindingManager.ModerateBindingCount">

[Maria, 2015/06/16 01:33:02]

We prefer not to start new top level namespaces for histograms if possible, I
would consider adding this to an existing one.

[Jaekyun Seok (inactive), 2015/06/16 02:40:32]

I changed it to "Android.ModerateBindingCount".

+  <owner>jaekyun@chromium.org</owner>
+  <summary>
+    The number of moderate bindings which were kept while Chrome process is in
+    the foreground.
+  </summary>
+</histogram>
+
 <histogram name="MobileFre.SignInChoice" enum="MobileFreSignInChoice">
   <owner>aruslan@chromium.org</owner>
   <summary>
@@ -43935,6 +43943,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Tab.TotalTabCountBeforeLeavingApp">
+  <owner>jaekyun@chromium.org</owner>
+  <summary>
+    The total count of tabs which were kept while Chrome process is in the
+    foreground.
+  </summary>
+</histogram>
+
 <histogram name="Tabs.CountAtResume" units="tabs">
   <owner>lliabraa@chromium.org</owner>
   <summary>