Reland review 34393006: Refactor MediaStreamManager to not output real device id.

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"
 
-#include "base/strings/stringprintf.h"
+#include "base/strings/string_number_conversions.h"
 #include "content/public/common/media_stream_request.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 MockMediaStreamDispatcher::MockMediaStreamDispatcher()
     : MediaStreamDispatcher(NULL),
       request_id_(-1),
       request_stream_counter_(0),
       stop_audio_device_counter_(0),
       stop_video_device_counter_(0),
       session_id_(0) {
 }
 
 MockMediaStreamDispatcher::~MockMediaStreamDispatcher() {}
 
 void MockMediaStreamDispatcher::GenerateStream(
     int request_id,
     const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
     const StreamOptions& components,
     const GURL& url) {
   request_id_ = request_id;
 
-  stream_label_ = base::StringPrintf("%s%d","local_stream",request_id);
+  stream_label_ = "local_stream" + base::IntToString(request_id);
   audio_array_.clear();
   video_array_.clear();
 
   if (IsAudioMediaType(components.audio_type)) {
     StreamDeviceInfo audio;
-    audio.device.id = "audio_device_id";
+    audio.device.id = "audio_device_id" + base::IntToString(session_id_);
     audio.device.name = "microphone";
     audio.device.type = components.audio_type;
     audio.session_id = session_id_;
     audio_array_.push_back(audio);
   }
   if (IsVideoMediaType(components.video_type)) {
     StreamDeviceInfo video;
-    video.device.id = "video_device_id";
+    video.device.id = "video_device_id" + base::IntToString(session_id_);
     video.device.name = "usb video camera";
     video.device.type = components.video_type;
     video.session_id = session_id_;
     video_array_.push_back(video);
   }
   ++request_stream_counter_;
 }
 
 void MockMediaStreamDispatcher::CancelGenerateStream(
   int request_id,
@@ skipping 22 matching lines @@
                                                 int index) {
   return -1;
 }
 
 int MockMediaStreamDispatcher::audio_session_id(const std::string& label,
                                                 int index) {
   return -1;
 }
 
 }  // namespace content