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

chrome/browser/media/cast_transport_host_filter.h

 // Copyright 2014 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 CHROME_BROWSER_MEDIA_CAST_TRANSPORT_HOST_FILTER_H_
 #define CHROME_BROWSER_MEDIA_CAST_TRANSPORT_HOST_FILTER_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/default_tick_clock.h"
 #include "content/public/browser/browser_message_filter.h"
 #include "media/cast/cast_sender.h"
 #include "media/cast/logging/logging_defines.h"
 #include "media/cast/net/cast_transport.h"
 #include "media/cast/net/udp_transport.h"
 
-namespace content {
+namespace device {
 class PowerSaveBlocker;
-}  // namespace content
+}  // namespace device
 
 namespace cast {
 
 class CastTransportHostFilter : public content::BrowserMessageFilter {
  public:
   CastTransportHostFilter();
 
  private:
   ~CastTransportHostFilter() override;
 
@@ skipping 49 matching lines @@
              const net::IPEndPoint& remote_end_point,
              const base::DictionaryValue& options);
   void OnDelete(int32_t channel_id);
 
   IDMap<media::cast::CastTransport, IDMapOwnPointer> id_map_;
 
   // Clock used by Cast transport.
   base::DefaultTickClock clock_;
 
   // While |id_map_| is non-empty, hold an instance of
-  // content::PowerSaveBlocker.  This prevents Chrome from being suspended while
+  // device::PowerSaveBlocker.  This prevents Chrome from being suspended while
   // remoting content.
-  std::unique_ptr<content::PowerSaveBlocker> power_save_blocker_;
+  std::unique_ptr<device::PowerSaveBlocker> power_save_blocker_;
 
   base::WeakPtrFactory<CastTransportHostFilter> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastTransportHostFilter);
 };
 
 }  // namespace cast
 
 #endif  // CHROME_BROWSER_MEDIA_CAST_TRANSPORT_HOST_FILTER_H_