Hide fullscreen rotation jank

third_party/WebKit/Source/core/frame/FullscreenController.cpp

Index: third_party/WebKit/Source/core/frame/FullscreenController.cpp
diff --git a/third_party/WebKit/Source/core/frame/FullscreenController.cpp b/third_party/WebKit/Source/core/frame/FullscreenController.cpp
index ce21bdb161d574109a03a120b6d4709a446d626c..546a2ecc5b9a0c4301de75831e2cb87efe1fd1e7 100644
--- a/third_party/WebKit/Source/core/frame/FullscreenController.cpp
+++ b/third_party/WebKit/Source/core/frame/FullscreenController.cpp
@@ -130,6 +130,7 @@ void FullscreenController::DidExitFullscreen() {
       next_frame = next_frame->Tree().TraverseNext();
     frame = next_frame;
   }
+  web_view_base_->LayerTreeView()->SetIsFullscreen(false);
 }
 
 void FullscreenController::EnterFullscreen(LocalFrame& frame) {
@@ -253,6 +254,8 @@ void FullscreenController::UpdateSize() {
       }
     }
   }
+  if (state_ == State::kFullscreen)
+    web_view_base_->LayerTreeView()->SetIsFullscreen(true);
 }
 
 void FullscreenController::DidUpdateLayout() {