Seems incorrect to se device_scale_factor in SetLocalSurfaceId.

cc/surfaces/display.h

Index: cc/surfaces/display.h
diff --git a/cc/surfaces/display.h b/cc/surfaces/display.h
index 35b504149b23362a8e2de6c3bcb64a600469c04f..b4b95b5b9bac755ad551c87e07f3e3c0ea2a747c 100644
--- a/cc/surfaces/display.h
+++ b/cc/surfaces/display.h
@@ -65,9 +65,10 @@ class CC_SURFACES_EXPORT Display : public DisplaySchedulerClient,
 
   void Initialize(DisplayClient* client, SurfaceManager* surface_manager);
 
+  void SetLocalSurfaceId(const LocalSurfaceId& id);
   // device_scale_factor is used to communicate to the external window system
   // what scale this was rendered at.
-  void SetLocalSurfaceId(const LocalSurfaceId& id, float device_scale_factor);
+  void SetDeviceScaleFactor(float device_scale_factor);
   void SetVisible(bool visible);
   void Resize(const gfx::Size& new_size);
   void SetColorSpace(const gfx::ColorSpace& color_space);