Remove top controls layer from cc/.

cc/top_controls_manager.h

Index: cc/top_controls_manager.h
diff --git a/cc/top_controls_manager.h b/cc/top_controls_manager.h
index 37d1670f572ae2b68da03a51975eff433d7e3f58..5cfbf0205cfa91aea99ff52dcc39cd7a438a0c45 100644
--- a/cc/top_controls_manager.h
+++ b/cc/top_controls_manager.h
@@ -28,7 +28,6 @@ class CC_EXPORT TopControlsManager {
                                                float top_controls_height);
   virtual ~TopControlsManager();
 
-  void set_content_layer_id(int id) { content_layer_id_ = id; }
   float controls_top_offset() { return controls_top_offset_; }
   float content_top_offset() { return content_top_offset_; }
   float is_overlay_mode() { return is_overlay_mode_; }
@@ -60,7 +59,6 @@ class CC_EXPORT TopControlsManager {
                                       // this.
 
   scoped_ptr<KeyframedFloatAnimationCurve> top_controls_animation_;
-  int content_layer_id_;
   bool is_showing_animation_;
   bool is_overlay_mode_;
   float controls_top_offset_;