Use IpcVideoFrameCapturer on network thread instead of capturer thread.

remoting/host/desktop_session_proxy.h

Index: remoting/host/desktop_session_proxy.h
diff --git a/remoting/host/desktop_session_proxy.h b/remoting/host/desktop_session_proxy.h
index 52fa521d7a769c5e242caf8dacdc32d5892bb82c..f54713feaddc50c18d1ba25296f2942843063e4e 100644
--- a/remoting/host/desktop_session_proxy.h
+++ b/remoting/host/desktop_session_proxy.h
@@ -76,7 +76,6 @@ class DesktopSessionProxy
       scoped_refptr<base::SingleThreadTaskRunner> audio_capture_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner,
       base::WeakPtr<ClientSessionControl> client_session_control,
       base::WeakPtr<DesktopSessionConnector> desktop_session_connector,
       bool virtual_terminal,
@@ -169,14 +168,6 @@ class DesktopSessionProxy
   // Handles InjectClipboardEvent request from the desktop integration process.
   void OnInjectClipboardEvent(const std::string& serialized_event);
 
-  // Posts OnCaptureCompleted() to |video_capturer_| on the video thread,
-  // passing |frame|.
-  void PostCaptureCompleted(scoped_ptr<webrtc::DesktopFrame> frame);
-
-  // Posts OnMouseCursor() to |mouse_cursor_monitor_| on the video thread,
-  // passing |mouse_cursor|.
-  void PostMouseCursor(scoped_ptr<webrtc::MouseCursor> mouse_cursor);
-
   // Sends a message to the desktop session agent. The message is silently
   // deleted if the channel is broken.
   void SendToDesktop(IPC::Message* message);
@@ -186,11 +177,9 @@ class DesktopSessionProxy
   //   - public methods of this class (with some exceptions) are called on
   //     |caller_task_runner_|.
   //   - background I/O is served on |io_task_runner_|.
-  //   - |video_capturer_| is called back on |video_capture_task_runner_|.
   scoped_refptr<base::SingleThreadTaskRunner> audio_capture_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
-  scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner_;
 
   // Points to the audio capturer receiving captured audio packets.
   base::WeakPtr<IpcAudioCapturer> audio_capturer_;