Hide fullscreen rotation jank

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 62e587ce860fceb390dcb40e31992f43b843aa36..26c9c8d008b670ee90dd5c708e7aa4af06fe0694 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1587,6 +1587,7 @@ CompositorFrameMetadata LayerTreeHostImpl::MakeCompositorFrameMetadata() const {
   metadata.page_scale_factor = active_tree_->current_page_scale_factor();
   metadata.scrollable_viewport_size = active_tree_->ScrollableViewportSize();
   metadata.root_layer_size = active_tree_->ScrollableSize();
+  metadata.device_viewport_size = active_tree_->device_viewport_size();
   metadata.min_page_scale_factor = active_tree_->min_page_scale_factor();
   metadata.max_page_scale_factor = active_tree_->max_page_scale_factor();
   metadata.top_controls_height =
@@ -1639,6 +1640,8 @@ CompositorFrameMetadata LayerTreeHostImpl::MakeCompositorFrameMetadata() const {
   metadata.root_scroll_offset =
       gfx::ScrollOffsetToVector2dF(active_tree_->TotalScrollOffset());
 
+  metadata.is_fullscreen = is_fullscreen_;
+
   return metadata;
 }
 
@@ -2147,6 +2150,12 @@ void LayerTreeHostImpl::SetVisible(bool visible) {
   }
 }
 
+void LayerTreeHostImpl::SetIsFullscreen(bool is_fullscreen) {
+  DCHECK(task_runner_provider_->IsImplThread());
+
+  is_fullscreen_ = is_fullscreen;
+}
+
 void LayerTreeHostImpl::SetNeedsOneBeginImplFrame() {
   // TODO(miletus): This is just the compositor-thread-side call to the
   // SwapPromiseMonitor to say something happened that may cause a swap in the