Record permission prompt gesture metrics on Android.

chrome/browser/permissions/permission_uma_util.h

Index: chrome/browser/permissions/permission_uma_util.h
diff --git a/chrome/browser/permissions/permission_uma_util.h b/chrome/browser/permissions/permission_uma_util.h
index f56e40d96c5b0393bcdb6ce0b8b4c2e7156d8c56..e4943a8e9a357d0ae6695b3271a78fe0851aa986 100644
--- a/chrome/browser/permissions/permission_uma_util.h
+++ b/chrome/browser/permissions/permission_uma_util.h
@@ -9,6 +9,7 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
+#include "chrome/browser/permissions/permission_request.h"
 #include "chrome/browser/permissions/permission_util.h"
 
 enum class PermissionRequestGestureType;
@@ -126,6 +127,13 @@ class PermissionUmaUtil {
   static void PermissionPromptShown(
       const std::vector<PermissionRequest*>& requests);
 
+  // Records the request type and gesture type for a shown prompt. Defined
+  // separately as Android must call this method explicitly until the
+  // PermissionRequestManager refactoring is completed.
+  static void RecordPermissionPromptTypeAndGesture(

[benwells, 2016/11/02 06:39:35]

Are you planning to add analogs for PermissionPromptAccepted? These are subtly
different to the other PermissionAccepted UMA.

[dominickn, 2016/11/03 02:18:21]

Oh crud, they're recorded separately too. This is horrible. :(

+      PermissionRequestType request_type,
+      PermissionRequestGestureType gesture_type);
+
   // The following two functions can be combined with the PermissionPromptShown
   // metrics to calculate accept, deny and ignore rates.
   // Note that for coalesced permission bubbles, PermissionPromptAccepted will