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

chrome/browser/media/media_stream_devices_controller.cc

 // 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.
 
 #include "chrome/browser/media/media_stream_devices_controller.h"
 
 #include <map>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 289 matching lines @@
   RecordPermissionAction(
       request_, base::Bind(PermissionUmaUtil::PermissionDismissed));
   RunCallback(old_audio_setting_, old_video_setting_,
               content::MEDIA_DEVICE_PERMISSION_DISMISSED);
 }
 
 void MediaStreamDevicesController::RequestFinished() {
   delete this;
 }
 
+PermissionBubbleType MediaStreamDevicesController::GetPermissionBubbleType()
+    const {
+  return PermissionBubbleType::MEDIA_STREAM;
+}
+
 content::MediaStreamDevices MediaStreamDevicesController::GetDevices(
     ContentSetting audio_setting,
     ContentSetting video_setting) {
   bool audio_allowed = audio_setting == CONTENT_SETTING_ALLOW;
   bool video_allowed = video_setting == CONTENT_SETTING_ALLOW;
 
   if (!audio_allowed && !video_allowed)
     return content::MediaStreamDevices();
 
   content::MediaStreamDevices devices;
@@ skipping 291 matching lines @@
   if (android_permission_blocked)
     return false;
 
   // Don't approve device requests if the tab was hidden.
   // TODO(qinmin): Add a test for this. http://crbug.com/396869.
   // TODO(raymes): Shouldn't this apply to all permissions not just audio/video?
   return web_contents_->GetRenderWidgetHostView()->IsShowing();
 #endif
   return true;
 }