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

content/browser/wake_lock/wake_lock_service_context.h

Index: content/browser/wake_lock/wake_lock_service_context.h
diff --git a/content/browser/wake_lock/wake_lock_service_context.h b/content/browser/wake_lock/wake_lock_service_context.h
index 28ce10898406c645056fc046a4c059397be5a458..31bd1cbbf605facbc6af3ab57436a72fc99219b6 100644
--- a/content/browser/wake_lock/wake_lock_service_context.h
+++ b/content/browser/wake_lock/wake_lock_service_context.h
@@ -20,9 +20,12 @@
 #include "ui/android/view_android.h"
 #endif  // OS_ANDROID
 
+namespace device {
+class PowerSaveBlocker;
+}  // namespace device
+
 namespace content {
 
-class PowerSaveBlocker;
 class RenderFrameHost;
 class WebContents;
 
@@ -62,7 +65,7 @@ class CONTENT_EXPORT WakeLockServiceContext : public WebContentsObserver {
   std::set<std::pair<int, int>> frames_requesting_lock_;
 
   // The actual power save blocker for screen.
-  std::unique_ptr<PowerSaveBlocker> wake_lock_;
+  std::unique_ptr<device::PowerSaveBlocker> wake_lock_;
 #if defined(OS_ANDROID)
   std::unique_ptr<base::WeakPtrFactory<ui::ViewAndroid>> view_weak_factory_;
 #endif