Add UMA to track permission changes from the content settings menu

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 6173e3de0485f977d8c524ef490082660b9e99c7..df41435d8824af8238d718d5806ff00ec1430e91 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -43404,13 +43404,51 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="WebsiteSettings.Menu.PermissionChanged" enum="ContentType">
+  <owner>miguelg@chromium.org</owner>
+  <owner>finnur@chromium.org</owner>
+  <summary>
+    Count of how often a specific content type (permission) is changed using the
+    content settings menu.
+  </summary>
+</histogram>
+
+<histogram name="WebsiteSettings.Menu.PermissionChanged.Allowed"
+    enum="ContentType">
+  <owner>miguelg@chromium.org</owner>
+  <owner>finnur@chromium.org</owner>
+  <summary>
+    Count of how often a specific content type (permission) is set to 'Allowed'
+    using the content settings menu.
+  </summary>
+</histogram>
+
+<histogram name="WebsiteSettings.Menu.PermissionChanged.Ask" enum="ContentType">
+  <owner>miguelg@chromium.org</owner>
+  <owner>finnur@chromium.org</owner>
+  <summary>
+    Count of how often a specific content type (permission) is set to 'Ask'
+    using the content settings menu.

[Finnur, 2015/02/23 14:15:27]

Same here. The content settings menu doesn't provide an Ask option. Only
Allow/Block/Clear&Reset.

[Miguel Garcia, 2015/02/23 14:35:21]

Done.

+  </summary>
+</histogram>
+
+<histogram name="WebsiteSettings.Menu.PermissionChanged.Blocked"
+    enum="ContentType">
+  <owner>miguelg@chromium.org</owner>
+  <owner>finnur@chromium.org</owner>
+  <summary>
+    Count of how often a specific content type (permission) is set to 'Blocked'
+    using the content settings menu.
+  </summary>
+</histogram>
+
 <histogram name="WebsiteSettings.OriginInfo.PermissionChanged"
     enum="ContentType">
   <owner>sashab@chromium.org</owner>
   <owner>felt@chromium.org</owner>
   <summary>
     Count of how often a specific content type (permission) is changed using the
-    Origin Info dialog on Android.
+    Origin Info dialog.
   </summary>
 </histogram>
 
@@ -43420,7 +43458,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <owner>felt@chromium.org</owner>
   <summary>
     Count of how often a specific content type (permission) is set to 'Allowed'
-    using the Origin Info dialog on Android.
+    using the Origin Info dialog.
   </summary>
 </histogram>
 
@@ -43430,7 +43468,7 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <owner>felt@chromium.org</owner>
   <summary>
     Count of how often a specific content type (permission) is set to 'Blocked'
-    using the Origin Info dialog on Android.
+    using the Origin Info dialog.
   </summary>
 </histogram>