Add GetWakeLockWithoutContext() in WakeLockContextProvider mojo interface.

content/browser/download/download_request_core.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_CORE_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_CORE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/loader/resource_handler.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_save_info.h"
 #include "content/public/browser/download_url_parameters.h"
-
-namespace device {
-class PowerSaveBlocker;
-}  // namespace device
+#include "device/wake_lock/public/interfaces/wake_lock_service.mojom.h"
 
 namespace net {
 class HttpResponseHeaders;
 class URLRequest;
 class URLRequestStatus;
 }  // namespace net
 
 namespace content {
 class ByteStreamReader;
 class ByteStreamWriter;
@@ skipping 103 matching lines @@
   // populate the DownloadCreateInfo when the time comes.
   std::unique_ptr<DownloadSaveInfo> save_info_;
   uint32_t download_id_;
   bool transient_;
   DownloadUrlParameters::OnStartedCallback on_started_callback_;
 
   // Data flow
   scoped_refptr<net::IOBuffer> read_buffer_;    // From URLRequest.
   std::unique_ptr<ByteStreamWriter> stream_writer_;  // To rest of system.
 
-  // Keeps the system from sleeping while this is alive. If the
-  // system enters power saving mode while a request is alive, it can cause the
-  // request to fail and the associated download will be interrupted.
-  std::unique_ptr<device::PowerSaveBlocker> power_save_blocker_;
+  // Used to keep the system from sleeping while a download is ongoing. If the
+  // system enters power saving mode while a URLRequest is alive, it can cause
+  // URLRequest to fail and the associated download will be interrupted.
+  device::mojom::WakeLockServicePtr wake_lock_;
 
   // The following are used to collect stats.
   base::TimeTicks download_start_time_;
   base::TimeTicks last_stream_pause_time_;
   base::TimeDelta total_pause_time_;
 
   int64_t bytes_read_;
 
   int pause_count_;
   bool was_deferred_;
   bool is_partial_request_;
   bool started_;
 
   // When DownloadRequestCore initiates an abort (by blocking a redirect, for
   // example) it expects to eventually receive a OnResponseCompleted() with a
   // status indicating that the request was aborted. When this happens, the
   // interrupt reason in |abort_reason_| will be used instead of USER_CANCELED
   // which is vague.
   DownloadInterruptReason abort_reason_;
 
   // Each successful OnWillRead will yield a buffer of this size.
   static const int kReadBufSize = 32768;   // bytes
 
   DISALLOW_COPY_AND_ASSIGN(DownloadRequestCore);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_REQUEST_CORE_H_