[Chromoting] Remove screen saver logic out of ScreenCapturer implementations

webrtc/modules/desktop_capture/win/screen_capturer_win_gdi.h

 /*
  *  Copyright (c) 2014 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 66 matching lines @@
   // Rectangle describing the bounds of the desktop device context, relative to
   // the primary display's top-left.
   DesktopRect desktop_dc_rect_;
 
   // Class to calculate the difference between two screen bitmaps.
   std::unique_ptr<Differ> differ_;
 
   HMODULE dwmapi_library_ = NULL;
   DwmEnableCompositionFunc composition_func_ = nullptr;
 
-  // Used to suppress duplicate logging of SetThreadExecutionState errors.
-  bool set_thread_execution_state_failed_ = false;
-
   RTC_DISALLOW_COPY_AND_ASSIGN(ScreenCapturerWinGdi);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_WIN_SCREEN_CAPTURER_WIN_GDI_H_