Add a new metric for how many times permissions prompts are shown.

chrome/browser/media/media_stream_devices_controller.h

 // Copyright (c) 2012 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_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 41 matching lines @@
 
   // PermissionBubbleRequest:
   int GetIconId() const override;
   base::string16 GetMessageText() const override;
   base::string16 GetMessageTextFragment() const override;
   GURL GetOrigin() const override;
   void PermissionGranted() override;
   void PermissionDenied() override;
   void Cancelled() override;
   void RequestFinished() override;
+  PermissionBubbleType GetPermissionBubbleType() const override;
 
  private:
   // Returns a list of devices available for the request for the given
   // audio/video permission settings.
   content::MediaStreamDevices GetDevices(ContentSetting audio_setting,
                                          ContentSetting video_setting);
 
   // Runs |callback_| with the given audio/video permission settings. If neither
   // |audio_setting| or |video_setting| is set to allow, |denial_reason| should
   // be set to the error to be reported when running |callback_|.
@@ skipping 52 matching lines @@
   // audio/video devices was granted or not.
   content::MediaResponseCallback callback_;
 
   // Whether the permissions granted or denied by the user should be persisted.
   bool persist_permission_changes_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDevicesController);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICES_CONTROLLER_H_