Use IpcVideoFrameCapturer on network thread instead of capturer thread.

remoting/host/desktop_process.cc

Index: remoting/host/desktop_process.cc
diff --git a/remoting/host/desktop_process.cc b/remoting/host/desktop_process.cc
index 749fd657f619dc9ab9b40cc05cd7822b1c387332..b0afa8e16d072444577e019908b732179b927839 100644
--- a/remoting/host/desktop_process.cc
+++ b/remoting/host/desktop_process.cc
@@ -121,16 +121,10 @@ bool DesktopProcess::Start(
       AutoThread::CreateWithType(
           "I/O thread", caller_task_runner_, base::MessageLoop::TYPE_IO);
 
-  // Launch the video capture thread.
-  scoped_refptr<AutoThreadTaskRunner> video_capture_task_runner =
-      AutoThread::Create("Video capture thread", caller_task_runner_);
-
   // Create a desktop agent.
-  desktop_agent_ = new DesktopSessionAgent(audio_task_runner,
-                                           caller_task_runner_,
-                                           input_task_runner_,
-                                           io_task_runner,
-                                           video_capture_task_runner);
+  desktop_agent_ =
+      new DesktopSessionAgent(audio_task_runner, caller_task_runner_,
+                              input_task_runner_, io_task_runner);
 
   // Start the agent and create an IPC channel to talk to it.
   IPC::PlatformFileForTransit desktop_pipe;