Hide fullscreen rotation jank

content/browser/renderer_host/render_widget_host_view_base.h

Index: content/browser/renderer_host/render_widget_host_view_base.h
diff --git a/content/browser/renderer_host/render_widget_host_view_base.h b/content/browser/renderer_host/render_widget_host_view_base.h
index a56fd81a3d12e362b7a96e6f09aad54354c18c0c..8ed0959a3e7a6c5a7fdee7c62dc6b0b55e665662 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.h
+++ b/content/browser/renderer_host/render_widget_host_view_base.h
@@ -405,6 +405,9 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   // main frame.
   virtual void OnDidNavigateMainFrameToNewPage();
 
+  // Called by the WebContentsImpl when the fullscreen state is changed.
+  virtual void OnFullscreenStateChanged(bool is_fullscreen) {}
+
   // Called by WebContentsImpl to notify the view about a change in visibility
   // of context menu. The view can then perform platform specific tasks and
   // changes.