Ensure display hardware is powered up during Chromoting sessions.

remoting/host/capturer_win.cc

 // 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.
 
 #include "remoting/host/capturer.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 135 matching lines @@
 void CapturerGdi::InvalidateScreen(const SkISize& size) {
   helper_.InvalidateScreen(size);
 }
 
 void CapturerGdi::InvalidateFullScreen() {
   helper_.InvalidateFullScreen();
 }
 
 void CapturerGdi::CaptureInvalidRegion(
     const CaptureCompletedCallback& callback) {
+  // Force the system to power-up display hardware, if it has been suspended.
+  SetThreadExecutionState(ES_DISPLAY_REQUIRED);
+
+  // Perform the capture.
   CalculateInvalidRegion();
   SkRegion invalid_region;
   helper_.SwapInvalidRegion(&invalid_region);
   CaptureRegion(invalid_region, callback);
 }
 
 const SkISize& CapturerGdi::size_most_recent() const {
   return helper_.size_most_recent();
 }
 
@@ skipping 200 matching lines @@
 }
 
 }  // namespace
 
 // static
 Capturer* Capturer::Create() {
   return new CapturerGdi();
 }
 
 }  // namespace remoting