Reland of 'Move content/browser/power_save_blocker to //device/power_save_blocker'

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
+
 namespace net {
 class HttpResponseHeaders;
 class URLRequest;
 class URLRequestStatus;
 }  // namespace net
 
 namespace content {
 class DownloadManagerImpl;
 class ByteStreamReader;
 class ByteStreamWriter;
-class PowerSaveBlocker;
 struct DownloadCreateInfo;
 
 // This class encapsulates the core logic for reading data from a URLRequest and
 // writing it into a ByteStream. It's common to both DownloadResourceHandler and
 // UrlDownloader.
 //
 // Created, lives on and dies on the IO thread.
 class CONTENT_EXPORT DownloadRequestCore
     : public base::SupportsWeakPtr<DownloadRequestCore> {
  public:
@@ skipping 90 matching lines @@
   uint32_t download_id_;
   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<PowerSaveBlocker> power_save_blocker_;
+  std::unique_ptr<device::PowerSaveBlocker> power_save_blocker_;
 
   // The following are used to collect stats.
   base::TimeTicks download_start_time_;
   base::TimeTicks last_read_time_;
   base::TimeTicks last_stream_pause_time_;
   base::TimeDelta total_pause_time_;
   size_t last_buffer_size_;
   int64_t bytes_read_;
 
   int pause_count_;
@@ skipping 10 matching lines @@
 
   // 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_