Add metrics for permission prompt acceptance / denial

chrome/browser/permissions/permission_uma_util.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PERMISSIONS_PERMISSION_UMA_UTIL_H_
 #define CHROME_BROWSER_PERMISSIONS_PERMISSION_UMA_UTIL_H_
 
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 47 matching lines @@
   // useful to have separate UMA to a few reasons:
   // - to account for, and get data on coalesced permission bubbles
   // - there are other types of permissions prompts (e.g. download limiting)
   //   which don't go through PermissionContext
   // - the above metrics don't always add up (e.g. sum of
   //   granted+denied+dismissed+ignored is not equal to requested), so it is
   //   unclear from those metrics alone how many prompts are seen by users.
   static void PermissionPromptShown(
       const std::vector<PermissionBubbleRequest*>& requests);
 
+  // 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
+  // always be called, with |accept_states| containing whether each request was
+  // accepted or denied.
+  static void PermissionPromptAccepted(
+      const std::vector<PermissionBubbleRequest*>& requests,
+      const std::vector<bool>& accept_states);
+
+  static void PermissionPromptDenied(
+      const std::vector<PermissionBubbleRequest*>& requests);
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PermissionUmaUtil);
 };
 
 #endif  // CHROME_BROWSER_PERMISSIONS_PERMISSION_UMA_UTIL_H_