VideoCapture: migrate VideoCapture renderer-->host messages to mojo, part 2

content/browser/renderer_host/media/video_capture_host.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.
 //
 // VideoCaptureHost serves video capture related messages from
 // VideoCaptureMessageFilter which lives inside the render process.
 //
 // This class is owned by RenderProcessHostImpl, and instantiated on UI
 // thread, but all other operations and method calls happen on IO thread.
 //
 // Here's an example of a typical IPC dialog for video capture:
 //
 //   Renderer                             VideoCaptureHost
 //      |                                        |
-//      |  VideoCaptureHostMsg_Start >           |
+//      |  --------- StartCapture -------->      |
 //      | < VideoCaptureMsg_StateChanged         |
 //      |        (VIDEO_CAPTURE_STATE_STARTED)   |
 //      | < VideoCaptureMsg_NewBuffer(1)         |
 //      | < VideoCaptureMsg_NewBuffer(2)         |
 //      | < VideoCaptureMsg_NewBuffer(3)         |
 //      |                                        |
 //      | < VideoCaptureMsg_BufferReady(1)       |
 //      | < VideoCaptureMsg_BufferReady(2)       |
 //      | VideoCaptureHostMsg_BufferReady(1) >   |
 //      | < VideoCaptureMsg_BufferReady(3)       |
@@ skipping 77 matching lines @@
   friend class base::DeleteHelper<VideoCaptureHost>;
   friend class MockVideoCaptureHost;
   friend class VideoCaptureHostTest;
 
   void DoError(VideoCaptureControllerID id);
   void DoEnded(VideoCaptureControllerID id);
 
   ~VideoCaptureHost() override;
 
   // IPC message handlers.
-  void OnStartCapture(int device_id,
-                      media::VideoCaptureSessionId session_id,
-                      const media::VideoCaptureParams& params);
-  void OnResumeCapture(int device_id,
-                       media::VideoCaptureSessionId session_id,
-                       const media::VideoCaptureParams& params);
   void OnRendererFinishedWithBuffer(int device_id,
                                     int buffer_id,
                                     const gpu::SyncToken& sync_token,
                                     double consumer_resource_utilization);
   void OnGetDeviceSupportedFormats(
       int device_id,
       media::VideoCaptureSessionId capture_session_id);
   void OnGetDeviceFormatsInUse(int device_id,
                                media::VideoCaptureSessionId capture_session_id);
 
   // mojom::VideoCaptureHost implementation
+  void Start(int32_t device_id,
+             int32_t session_id,
+             const media::VideoCaptureParams& params) override;
   void Stop(int32_t device_id) override;
   void Pause(int32_t device_id) override;
+  void Resume(int32_t device_id,
+              int32_t session_id,
+              const media::VideoCaptureParams& params) override;
   void RequestRefreshFrame(int32_t device_id) override;
 
   void OnControllerAdded(
       int device_id,
       const base::WeakPtr<VideoCaptureController>& controller);
 
   // Deletes the controller and notifies the VideoCaptureManager. |on_error| is
   // true if this is triggered by VideoCaptureControllerEventHandler::OnError.
   void DeleteVideoCaptureController(VideoCaptureControllerID controller_id,
                                     bool on_error);
 
   MediaStreamManager* const media_stream_manager_;
 
   // A map of VideoCaptureControllerID to the VideoCaptureController to which it
   // is connected. An entry in this map holds a null controller while it is in
   // the process of starting.
   std::map<VideoCaptureControllerID, base::WeakPtr<VideoCaptureController>>
       controllers_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_