Introduce ViewRoot forwarding input/view events to native

ui/display/screen.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 UI_DISPLAY_SCREEN_H_
 #define UI_DISPLAY_SCREEN_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 42 matching lines @@
   virtual int GetNumDisplays() const = 0;
 
   // Returns the list of displays that are currently available.
   virtual const std::vector<Display>& GetAllDisplays() const = 0;
 
   // Returns the display nearest the specified window.
   // If the window is NULL or the window is not rooted to a display this will
   // return the primary display.
   virtual Display GetDisplayNearestWindow(gfx::NativeView view) const = 0;
 
+#if defined(OS_ANDROID)
+  // This method is needed since NativeWindow is not a NativeView on Android.
+  virtual display::Display GetDisplayNearestWindowAndroid(
+      gfx::NativeWindow window) const = 0;
+#endif
+
   // Returns the display nearest the specified point. |point| should be in DIPs.
   virtual Display GetDisplayNearestPoint(const gfx::Point& point) const = 0;
 
   // Returns the display that most closely intersects the provided bounds.
   virtual Display GetDisplayMatching(const gfx::Rect& match_rect) const = 0;
 
   // Returns the primary display.
   virtual Display GetPrimaryDisplay() const = 0;
 
   // Adds/Removes display observers.
@@ skipping 19 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Screen);
 };
 
 Screen* CreateNativeScreen();
 
 }  // namespace display
 
 #endif  // UI_DISPLAY_SCREEN_H_