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

content/browser/media/capture/aura_window_capture_machine.h

Index: content/browser/media/capture/aura_window_capture_machine.h
diff --git a/content/browser/media/capture/aura_window_capture_machine.h b/content/browser/media/capture/aura_window_capture_machine.h
index ceb6e7f61af130faa18b76228bae721a9b0789d4..848c3251de8fd35497f52e36c0fe63ec5f27940d 100644
--- a/content/browser/media/capture/aura_window_capture_machine.h
+++ b/content/browser/media/capture/aura_window_capture_machine.h
@@ -18,19 +18,19 @@
 #include "ui/compositor/compositor_animation_observer.h"
 
 namespace cc {
-
 class CopyOutputResult;
-
 }  // namespace cc
 
+namespace device {
+class PowerSaveBlocker;
+}  // namespace device
+
 namespace display_compositor {
 class ReadbackYUVInterface;
 }
 
 namespace content {
 
-class PowerSaveBlocker;
-
 class AuraWindowCaptureMachine
     : public media::VideoCaptureMachine,
       public aura::WindowObserver,
@@ -124,7 +124,7 @@ class AuraWindowCaptureMachine
 
   // TODO(jiayl): Remove power_save_blocker_ when there is an API to keep the
   // screen from sleeping for the drive-by web.
-  std::unique_ptr<PowerSaveBlocker> power_save_blocker_;
+  std::unique_ptr<device::PowerSaveBlocker> power_save_blocker_;
 
   // WeakPtrs are used for the asynchronous capture callbacks passed to external
   // modules.  They are only valid on the UI thread and become invalidated