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

chrome/browser/media/cast_transport_host_filter.h

Index: chrome/browser/media/cast_transport_host_filter.h
diff --git a/chrome/browser/media/cast_transport_host_filter.h b/chrome/browser/media/cast_transport_host_filter.h
index ad9818e027663bea507693fbfb2212e4d5c7e452..fefde8b144946c47571881e0a685619138178ca6 100644
--- a/chrome/browser/media/cast_transport_host_filter.h
+++ b/chrome/browser/media/cast_transport_host_filter.h
@@ -19,9 +19,9 @@
 #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 {
 
@@ -91,9 +91,9 @@ class CastTransportHostFilter : public content::BrowserMessageFilter {
   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_;