Hide fullscreen rotation jank

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
index dc40268bf5d18466318c848cb4b9c74d942fcadb..95888e93b12b0bdc14b15db6c7e6726b5495fa40 100644
--- a/cc/trees/layer_tree_impl.h
+++ b/cc/trees/layer_tree_impl.h
@@ -262,6 +262,9 @@ class CC_EXPORT LayerTreeImpl {
     has_transparent_background_ = transparent;
   }
 
+  bool is_fullscreen() const { return is_fullscreen_; }
+  void set_is_fullscreen(bool is_fullscreen) { is_fullscreen_ = is_fullscreen; }
+
   void UpdatePropertyTreeScrollingAndAnimationFromMainThread(
       bool is_impl_side_update);
   void SetPageScaleOnActiveTree(float active_page_scale);
@@ -564,6 +567,7 @@ class CC_EXPORT LayerTreeImpl {
   PropertyTrees property_trees_;
   SkColor background_color_;
   bool has_transparent_background_;
+  bool is_fullscreen_;
 
   int last_scrolled_scroll_node_index_;