[Chromoting] Use device::PowerSaveBlocker to block screen saver

remoting/host/desktop_capturer_proxy.h

 // Copyright 2015 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_DESKTOP_CAPTURER_PROXY_H_
 #define REMOTING_HOST_DESKTOP_CAPTURER_PROXY_H_
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
+#include "device/power_save_blocker/power_save_blocker.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
 
 namespace base {
+class SequencedTaskRunner;
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace webrtc {
 class DesktopCaptureOptions;
 }  // namespace webrtc
 
 namespace remoting {
 
 namespace protocol {
 class CursorShapeInfo;
 }  // namespace protocol
 
 // DesktopCapturerProxy is responsible for calling webrtc::DesktopCapturer on
 // the capturer thread and then returning results to the caller's thread.
 class DesktopCapturerProxy : public webrtc::DesktopCapturer {
  public:
   DesktopCapturerProxy(
       scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
+      scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> blocking_task_runner,
       const webrtc::DesktopCaptureOptions& options);
   ~DesktopCapturerProxy() override;
 
   // webrtc::DesktopCapturer interface.
   void Start(Callback* callback) override;
   void SetSharedMemoryFactory(std::unique_ptr<webrtc::SharedMemoryFactory>
                                   shared_memory_factory) override;
   void Capture(const webrtc::DesktopRegion& rect) override;
 
  private:
   class Core;
 
   void OnFrameCaptured(webrtc::DesktopCapturer::Result result,
                        std::unique_ptr<webrtc::DesktopFrame> frame);
 
   base::ThreadChecker thread_checker_;
 
   std::unique_ptr<Core> core_;
   scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner_;
   webrtc::DesktopCapturer::Callback* callback_;
 
+  device::PowerSaveBlocker power_save_blocker_;

[Sergey Ulanov, 2016/06/22 19:05:37]

Power-blocking isn't related to screen capturing, so I don't think it belongs
here. Put it in ClientSession?

[Hzj_jie, 2016/06/24 19:14:29]

Done.

+
   base::WeakPtrFactory<DesktopCapturerProxy> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopCapturerProxy);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_DESKTOP_CAPTURER_PROXY_H_