Hide fullscreen rotation jank

content/browser/renderer_host/render_widget_host_view_android.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 322 matching lines @@
   void SendBeginFrame(cc::BeginFrameArgs args);
   bool Animate(base::TimeTicks frame_time);
   void RequestDisallowInterceptTouchEvent();
 
   bool SyncCompositorOnMessageReceived(const IPC::Message& message);
 
   void ComputeEventLatencyOSTouchHistograms(const ui::MotionEvent& event);
 
   void CreateOverscrollControllerIfPossible();
 
+  bool CheckForFullscreenTransitionJank(
+      const cc::CompositorFrameMetadata& metadata);
+  std::unique_ptr<cc::RenderPass> CreateBlackRenderPass();
+
   // The model object.
   RenderWidgetHostImpl* host_;
 
   // The begin frame source being observed.  Null if none.
   cc::BeginFrameSource* begin_frame_source_;
   cc::BeginFrameArgs last_begin_frame_args_;
   uint32_t latest_confirmed_begin_frame_source_id_;
   uint64_t latest_confirmed_begin_frame_sequence_number_;
 
   // Indicates whether and for what reason a request for begin frames has been
@@ skipping 66 matching lines @@
   float prev_top_shown_pix_;
   float prev_bottom_shown_pix_;
 
   cc::mojom::MojoCompositorFrameSinkClient* renderer_compositor_frame_sink_ =
       nullptr;
 
   base::ObserverList<DestructionObserver> destruction_observers_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAndroid> weak_ptr_factory_;
 
+  bool was_fullscreen_ = false;
+  bool fullscreen_transitioning_ = false;
+  gfx::Size prev_physical_backing_size_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_