Use PowerSaveBlocker for audio and video on Chrome OS.

chrome/browser/drive/drive_uploader.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 "chrome/browser/drive/drive_uploader.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 41 matching lines @@
                  const UploadCompletionCallback& callback,
                  const ProgressCallback& progress_callback)
       : file_path(local_path),
         content_type(content_type),
         completion_callback(callback),
         progress_callback(progress_callback),
         content_length(0),
         next_start_position(-1),
         power_save_blocker(content::PowerSaveBlocker::Create(
             content::PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
+            content::PowerSaveBlocker::kReasonOther,
             "Upload in progress")),
         cancelled(false),
-        weak_ptr_factory_(this) {
-  }
+        weak_ptr_factory_(this) {}
 
   ~UploadFileInfo() {
   }
 
   // Useful for printf debugging.
   std::string DebugString() const {
     return "file_path=[" + file_path.AsUTF8Unsafe() +
            "], content_type=[" + content_type +
            "], content_length=[" + base::UintToString(content_length) +
            "]";
@@ skipping 377 matching lines @@
   } else {
     DVLOG(1) << "Upload failed " << upload_file_info->DebugString();
     if (error == HTTP_PRECONDITION)
       error = HTTP_CONFLICT;  // ETag mismatch.
     upload_file_info->completion_callback.Run(
         error, upload_file_info->upload_location, scoped_ptr<FileResource>());
   }
 }
 
 }  // namespace drive