Made Blink aware of top controls offset (Chromium-side)

cc/input/top_controls_manager.h

Index: cc/input/top_controls_manager.h
diff --git a/cc/input/top_controls_manager.h b/cc/input/top_controls_manager.h
index 7d631d85bb1b1b419b73128a7161144e27a21e07..4657618120515609842cde790ec33d78be5ee649 100644
--- a/cc/input/top_controls_manager.h
+++ b/cc/input/top_controls_manager.h
@@ -62,6 +62,8 @@ class CC_EXPORT TopControlsManager
   void PinchEnd();
 
   gfx::Vector2dF Animate(base::TimeTicks monotonic_time);
+  void SetControlsTopOffset(float offset);
+  float top_controls_height() { return top_controls_height_; }
 
  protected:
   TopControlsManager(TopControlsManagerClient* client,
@@ -70,7 +72,6 @@ class CC_EXPORT TopControlsManager
                      float top_controls_hide_threshold);
 
  private:
-  void SetControlsTopOffset(float offset);
   void ResetAnimations();
   void SetupAnimation(AnimationDirection direction);
   void StartAnimationIfNecessary();