Use PowerSaveBlocker for audio and video on Chrome OS.

content/browser/media/capture/desktop_capture_device_aura.cc

 // Copyright 2013 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 "content/browser/media/capture/desktop_capture_device_aura.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/timer/timer.h"
 #include "cc/output/copy_output_request.h"
@@ skipping 200 matching lines @@
   // Update capture size.
   UpdateCaptureSize();
 
   // Start observing window events.
   desktop_window_->AddObserver(this);
 
   // Start observing compositor updates.
   if (desktop_window_->GetHost())
     desktop_window_->GetHost()->compositor()->AddObserver(this);
 
-  power_save_blocker_.reset(PowerSaveBlocker::Create(
-      PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep,
-      "DesktopCaptureDevice is running").release());
+  power_save_blocker_.reset(
+      PowerSaveBlocker::Create(
+          PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep,
+          PowerSaveBlocker::kReasonOther,
+          "DesktopCaptureDevice is running").release());
 
   // Starts timer.
   timer_.Start(FROM_HERE, oracle_proxy_->min_capture_period(),
                base::Bind(&DesktopVideoCaptureMachine::Capture, AsWeakPtr(),
                           false));
 
   return true;
 }
 
 void DesktopVideoCaptureMachine::Stop(const base::Closure& callback) {
@@ skipping 298 matching lines @@
     scoped_ptr<Client> client) {
   DVLOG(1) << "Allocating " << params.requested_format.frame_size.ToString();
   core_->AllocateAndStart(params, client.Pass());
 }
 
 void DesktopCaptureDeviceAura::StopAndDeAllocate() {
   core_->StopAndDeAllocate();
 }
 
 }  // namespace content