Introduce ViewRoot to forward input/view events to native

content/browser/web_contents/web_contents_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_WEB_CONTENTS_WEB_CONTENTS_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_ANDROID_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 17 matching lines @@
  public:
   WebContentsViewAndroid(WebContentsImpl* web_contents,
                          WebContentsViewDelegate* delegate);
   ~WebContentsViewAndroid() override;
 
   // Sets the interface to the view system. ContentViewCoreImpl is owned
   // by its Java ContentViewCore counterpart, whose lifetime is managed
   // by the UI frontend.
   void SetContentViewCore(ContentViewCoreImpl* content_view_core);
 
+  void OnPhysicalBackingSizeChanged(int width, int height);
+
   void set_synchronous_compositor_client(SynchronousCompositorClient* client) {
     synchronous_compositor_client_ = client;
   }
 
   SynchronousCompositorClient* synchronous_compositor_client() const {
     return synchronous_compositor_client_;
   }
 
   // WebContentsView implementation --------------------------------------------
   gfx::NativeView GetNativeView() const override;
@@ skipping 67 matching lines @@
 
   // Interface used to get notified of events from the synchronous compositor.
   SynchronousCompositorClient* synchronous_compositor_client_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_ANDROID_H_