Using WeakPtr for requests to MediaStreamDispatcher.

content/renderer/media/mock_media_stream_dispatcher.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 "content/renderer/media/mock_media_stream_dispatcher.h"
 
 MockMediaStreamDispatcher::MockMediaStreamDispatcher()
     : MediaStreamDispatcher(NULL),
       request_id_(-1),
-      event_handler_(NULL),
       components_(NULL),
       stop_stream_counter_(0) {
 }
 
 MockMediaStreamDispatcher::~MockMediaStreamDispatcher() {}
 
 void MockMediaStreamDispatcher::GenerateStream(
     int request_id,
-    MediaStreamDispatcherEventHandler* event_handler,
+    const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
     media_stream::StreamOptions components,
     const std::string& security_origin) {
   request_id_ = request_id;
   event_handler_ = event_handler;
   delete components_;
   components_ = new media_stream::StreamOptions(components.audio,
                                                 components.video_option);
   security_origin_ = security_origin;
 }
 
@@ skipping 10 matching lines @@
                                                 int index) {
   NOTIMPLEMENTED();
   return -1;
 }
 
 int MockMediaStreamDispatcher::audio_session_id(const std::string& label,
                                                 int index) {
   NOTIMPLEMENTED();
   return -1;
 }