Use IpcVideoFrameCapturer on network thread instead of capturer thread.

remoting/host/basic_desktop_environment.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.
 
 #ifndef REMOTING_HOST_BASIC_DESKTOP_ENVIRONMENT_H_
 #define REMOTING_HOST_BASIC_DESKTOP_ENVIRONMENT_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 27 matching lines @@
   std::string GetCapabilities() const override;
   void SetCapabilities(const std::string& capabilities) override;
   scoped_ptr<GnubbyAuthHandler> CreateGnubbyAuthHandler(
       protocol::ClientStub* client_stub) override;
 
  protected:
   friend class BasicDesktopEnvironmentFactory;
 
   BasicDesktopEnvironment(
       scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
       bool supports_touch_events);
 
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner() const {
     return caller_task_runner_;
   }
 
+  scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner()
+      const {
+    return video_capture_task_runner_;
+  }
+
   scoped_refptr<base::SingleThreadTaskRunner> input_task_runner() const {
     return input_task_runner_;
   }
 
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner() const {
     return ui_task_runner_;
   }
 
   webrtc::DesktopCaptureOptions* desktop_capture_options() {
     return desktop_capture_options_.get();
   }
 
  private:
   // Task runner on which methods of DesktopEnvironment interface should be
   // called.
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
 
+  // Used to run video capturer.
+  scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner_;
+
   // Used to run input-related tasks.
   scoped_refptr<base::SingleThreadTaskRunner> input_task_runner_;
 
   // Used to run UI code.
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
 
   // Options shared between |DesktopCapturer| and |MouseCursorMonitor|. It
   // might contain expensive resources, thus justifying the sharing.
   // Also: it's dynamically allocated to avoid having to bring in
   // desktop_capture_options.h which brings in X11 headers which causes hard to
   // find build errors.
   scoped_ptr<webrtc::DesktopCaptureOptions> desktop_capture_options_;
 
   // True if the touch events capability should be offered.
   const bool supports_touch_events_;
 
   DISALLOW_COPY_AND_ASSIGN(BasicDesktopEnvironment);
 };
 
 // Used to create |BasicDesktopEnvironment| instances.
 class BasicDesktopEnvironmentFactory : public DesktopEnvironmentFactory {
  public:
   BasicDesktopEnvironmentFactory(
       scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
   ~BasicDesktopEnvironmentFactory() override;
 
   // DesktopEnvironmentFactory implementation.
   bool SupportsAudioCapture() const override;
 
   void set_supports_touch_events(bool enable) {
     supports_touch_events_ = enable;
   }
 
  protected:
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner() const {
     return caller_task_runner_;
   }
 
+  scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner()
+      const {
+    return video_capture_task_runner_;
+  }
+
   scoped_refptr<base::SingleThreadTaskRunner> input_task_runner() const {
     return input_task_runner_;
   }
 
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner() const {
     return ui_task_runner_;
   }
 
   bool supports_touch_events() const { return supports_touch_events_; }
 
  private:
   // Task runner on which methods of DesktopEnvironmentFactory interface should
   // be called.
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
 
+  // Used to run video capture tasks.
+  scoped_refptr<base::SingleThreadTaskRunner> video_capture_task_runner_;
+
   // Used to run input-related tasks.
   scoped_refptr<base::SingleThreadTaskRunner> input_task_runner_;
 
   // Used to run UI code.
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
 
   // True if the touch events capability should be offered by the
   // DesktopEnvironment instances.
   bool supports_touch_events_;
 
   DISALLOW_COPY_AND_ASSIGN(BasicDesktopEnvironmentFactory);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_BASIC_DESKTOP_ENVIRONMENT_H_