[Android] Fix a flicker in stopping Chrome

content/browser/renderer_host/compositor_impl_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_COMPOSITOR_IMPL_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
 
 #include "base/basictypes.h"
 #include "base/cancelable_callback.h"
 #include "base/compiler_specific.h"
@@ skipping 43 matching lines @@
   // Compositor implementation.
   virtual void SetRootLayer(scoped_refptr<cc::Layer> root) override;
   virtual void SetSurface(jobject surface) override;
   virtual void SetVisible(bool visible) override;
   virtual void setDeviceScaleFactor(float factor) override;
   virtual void SetWindowBounds(const gfx::Size& size) override;
   virtual void SetHasTransparentBackground(bool flag) override;
   virtual void SetNeedsComposite() override;
   virtual ui::UIResourceProvider& GetUIResourceProvider() override;
   virtual ui::ResourceManager& GetResourceManager() override;
+  virtual void Pause() override;
+  virtual void Resume() override;
 
   // LayerTreeHostClient implementation.
   virtual void WillBeginMainFrame(int frame_id) override {}
   virtual void DidBeginMainFrame() override {}
   virtual void BeginMainFrame(const cc::BeginFrameArgs& args) override {}
   virtual void Layout() override;
   virtual void ApplyViewportDeltas(
       const gfx::Vector2d& inner_delta,
       const gfx::Vector2d& outer_delta,
       const gfx::Vector2dF& elastic_overscroll_delta,
@@ skipping 111 matching lines @@
   unsigned int pending_swapbuffers_;
 
   // Whether we are currently deferring a requested Composite operation until
   // the GPU channel is established (it was either lost or not yet fully
   // established the first time we tried to composite).
   bool defer_composite_for_gpu_channel_;
 
   base::TimeDelta vsync_period_;
   base::TimeTicks last_vsync_;
 
+  bool paused_;
+
   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_