Add UMA for the new generic permisison 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 1374c6a8e1b185e623e53d97f74f13ca3128b708..da88c4fb2eb990a7b8f6e1ffa02c2eab16c86845 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -2863,6 +2863,22 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <summary>The default popups setting at profile open.</summary>
 </histogram>
 
+<histogram name="ContentSettings.DefaultPushMessagingSetting"
+    enum="ContentSetting">
+  <owner>miguelg@chromium.org</owner>
+  <summary>
+    The default permission setting for push messages at profile open.
+  </summary>
+</histogram>
+
+<histogram name="ContentSettings.PermissionActions" enum="PermissionAction">
+  <owner>miguelg</owner>
+  <summary>
+    Used on a per permission basis (see histogram_suffix below). Tracks whether
+    a permission was granted,rejected...
+  </summary>
+</histogram>
+
 <histogram name="Cookie.ParsedCookieStatus" enum="ParsedCookieStatus">
   <obsolete>
     Deprecated as of 9/2013. Experiment to measure control characters in cookies
@@ -44137,6 +44153,14 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </int>
 </enum>
 
+<enum name="PermissionAction" type="int">
+  <int value="0" label="REQUESTED"/>
+  <int value="1" label="GRANTED"/>
+  <int value="2" label="DENYED"/>

[Bernhard Bauer, 2014/07/14 15:22:15]

Nit: DENIED

[Miguel Garcia, 2014/07/14 16:57:50]

Done.

+  <int value="3" label="DISMISSED"/>
+  <int value="4" label="IGNORED"/>
+</enum>
+
 <enum name="PhotoEditorFileType" type="int">
   <int value="0" label="jpg"/>
   <int value="1" label="png"/>
@@ -50490,6 +50514,12 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <affected-histogram name="PerformanceMonitor.HighCPU"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="PermissionActions">
+  <suffix name="MidiSysEx" label="Midi SysEx permsision actions"/>
+  <suffix name="PushMessaging" label="Push messaging permission actions"/>
+  <affected-histogram name="ContentSettings.PermissionActions"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="PpapiPluginName">
   <suffix name="libpepflashplayer.so" label="Flash player on Linux or Cros"/>
   <suffix name="libwidevinecdmadapter.so"