[Chromoting] Remove screen saver logic out of ScreenCapturer implementations

webrtc/modules/desktop_capture/win/screen_capturer_win_directx.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 434 matching lines @@
   if (g_container->duplication) {
     g_container->duplication->ReleaseFrame();
     g_container->duplication.Reset();
   }
 
   return DuplicateOutput();
 }
 
 ScreenCapturerWinDirectx::ScreenCapturerWinDirectx(
     const DesktopCaptureOptions& options)
-    : callback_(nullptr), set_thread_execution_state_failed_(false) {
+    : callback_(nullptr) {
   RTC_DCHECK(g_container && g_container->initialize_result);
 
   // Texture instance won't change forever.
   while (!surfaces_.current_frame()) {
     surfaces_.ReplaceCurrentFrame(std::unique_ptr<rtc::scoped_refptr<Texture>>(
         new rtc::scoped_refptr<Texture>(new Texture())));
     surfaces_.MoveToNextFrame();
   }
 }
 
@@ skipping 156 matching lines @@
     // Failed to initialize desktop duplication. This usually happens when
     // Windows is switching display mode. Retrying later usually resolves the
     // issue.
     callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
     return;
   }
 
   RTC_DCHECK(g_container->duplication);
   int64_t capture_start_time_nanos = rtc::TimeNanos();
 
-  if (!SetThreadExecutionState(ES_DISPLAY_REQUIRED | ES_SYSTEM_REQUIRED)) {
-    if (!set_thread_execution_state_failed_) {
-      set_thread_execution_state_failed_ = true;
-      LOG(LS_WARNING) << "Failed to make system & display power assertion: "
-                      << GetLastError();
-    }
-  }
-
   DXGI_OUTDUPL_FRAME_INFO frame_info;
   memset(&frame_info, 0, sizeof(DXGI_OUTDUPL_FRAME_INFO));
   ComPtr<IDXGIResource> resource;
   rtc::CritScope lock(&g_container->acquire_lock);
   _com_error error = g_container->duplication->AcquireNextFrame(
       kAcquireTimeoutMs, &frame_info, resource.GetAddressOf());
 
   if (error.Error() == DXGI_ERROR_WAIT_TIMEOUT) {
     // Nothing changed.
     EmitCurrentFrame();
@@ skipping 69 matching lines @@
   }
 
   // If there is no shared_memory_factory_, last frame is stored in surfaces_
   // queue.
   std::unique_ptr<DesktopFrame> frame(
       new DxgiDesktopFrame(*surfaces_.current_frame()));
   callback_->OnCaptureResult(Result::SUCCESS, std::move(frame));
 }
 
 }  // namespace webrtc