Use PowerSaveBlocker for audio and video on Chrome OS.

content/browser/loader/power_save_block_resource_throttle.cc

 // Copyright (c) 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/loader/power_save_block_resource_throttle.h"
 
 #include "base/profiler/scoped_tracker.h"
 #include "content/public/browser/power_save_blocker.h"
 
 namespace content {
@@ skipping 29 matching lines @@
   timer_.Stop();
 }
 
 const char* PowerSaveBlockResourceThrottle::GetNameForLogging() const {
   return "PowerSaveBlockResourceThrottle";
 }
 
 void PowerSaveBlockResourceThrottle::ActivatePowerSaveBlocker() {
   power_save_blocker_ = PowerSaveBlocker::Create(
       PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
-      "Uploading data.");
+      PowerSaveBlocker::kReasonOther, "Uploading data");
 }
 
 }  // namespace content