Hide fullscreen rotation jank

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 6b53b46c2d93cc0762504f59fb46855a80443b63..2b2c18f9bdd8737904b4afb3d3b06f7cf8902c22 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -448,6 +448,8 @@ class CC_EXPORT LayerTreeHostImpl
   virtual void SetVisible(bool visible);
   bool visible() const { return visible_; }
 
+  virtual void SetIsFullscreen(bool is_fullscreen);
+
   void SetNeedsCommit() { client_->SetNeedsCommitOnImplThread(); }
   void SetNeedsOneBeginImplFrame();
   void SetNeedsRedraw();
@@ -775,6 +777,7 @@ class CC_EXPORT LayerTreeHostImpl
   const LayerTreeSettings settings_;
   LayerTreeDebugState debug_state_;
   bool visible_;
+  bool is_fullscreen_ = false;
   ManagedMemoryPolicy cached_managed_memory_policy_;
 
   const bool is_synchronous_single_threaded_;