Make WindowAndroid a ViewAndroid

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 <stddef.h>
 
 #include <memory>
@@ skipping 112 matching lines @@
   void SetNeedsAnimate() override;
   void SetVisible(bool visible);
   void CreateOutputSurface();
   void CreateLayerTreeHost();
 
   void OnGpuChannelEstablished();
   void OnGpuChannelTimeout();
 
   // root_layer_ is the persistent internal root layer, while subroot_layer_
   // is the one attached by the compositor client.
-  scoped_refptr<cc::Layer> root_layer_;
   scoped_refptr<cc::Layer> subroot_layer_;
 
   // Destruction order matters here:
   std::unique_ptr<cc::SurfaceIdAllocator> surface_id_allocator_;
   base::ObserverList<VSyncObserver, true> observer_list_;
   std::unique_ptr<cc::LayerTreeHost> host_;
   ui::ResourceManagerImpl resource_manager_;
 
   std::unique_ptr<cc::Display> display_;
 
@@ skipping 28 matching lines @@
   gpu::Capabilities gpu_capabilities_;
   bool needs_begin_frames_;
   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_