Remove dead code related to media device enumerations and monitoring.

content/renderer/media/mock_media_stream_dispatcher.h

Index: content/renderer/media/mock_media_stream_dispatcher.h
diff --git a/content/renderer/media/mock_media_stream_dispatcher.h b/content/renderer/media/mock_media_stream_dispatcher.h
index 0735c53518be945c8f48c48d6e62f637de3051ba..d23f551786c0c483e2e8a64978f6322927e69920 100644
--- a/content/renderer/media/mock_media_stream_dispatcher.h
+++ b/content/renderer/media/mock_media_stream_dispatcher.h
@@ -28,19 +28,12 @@ class MockMediaStreamDispatcher : public MediaStreamDispatcher {
       int request_id,
       const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler)
       override;
-  void EnumerateDevices(
-      int request_id,
-      const base::WeakPtr<MediaStreamDispatcherEventHandler>& event_handler,
-      MediaStreamType type,
-      const url::Origin& security_origin) override;
   void StopStreamDevice(const StreamDeviceInfo& device_info) override;
   bool IsStream(const std::string& label) override;
   int video_session_id(const std::string& label, int index) override;
   int audio_session_id(const std::string& label, int index) override;
 
   int audio_input_request_id() const { return audio_input_request_id_; }
-  int audio_output_request_id() const { return audio_output_request_id_; }
-  int video_request_id() const { return video_request_id_; }
   int request_stream_counter() const { return request_stream_counter_; }
   void IncrementSessionId() { ++session_id_; }
   void TestSameId() { test_same_id_ = true; }
@@ -52,22 +45,13 @@ class MockMediaStreamDispatcher : public MediaStreamDispatcher {
   const StreamDeviceInfoArray& audio_input_array() const {
     return audio_input_array_;
   }
-  const StreamDeviceInfoArray& audio_output_array() const {
-    return audio_output_array_;
-  }
   const StreamDeviceInfoArray& video_array() const { return video_array_; }
-  size_t NumDeviceChangeSubscribers() const {
-    return MediaStreamDispatcher::NumDeviceChangeSubscribers();
-  }
 
  private:
   void AddAudioInputDeviceToArray(bool matched_output);
-  void AddAudioOutputDeviceToArray();
   void AddVideoDeviceToArray(bool facing_user);
 
   int audio_input_request_id_;
-  int audio_output_request_id_;  // Only used for EnumerateDevices.
-  int video_request_id_;  // Only used for EnumerateDevices.
   base::WeakPtr<MediaStreamDispatcherEventHandler> event_handler_;
   int request_stream_counter_;
   int stop_audio_device_counter_;
@@ -77,7 +61,6 @@ class MockMediaStreamDispatcher : public MediaStreamDispatcher {
   int session_id_;
   bool test_same_id_;
   StreamDeviceInfoArray audio_input_array_;
-  StreamDeviceInfoArray audio_output_array_;
   StreamDeviceInfoArray video_array_;
 
   DISALLOW_COPY_AND_ASSIGN(MockMediaStreamDispatcher);