Make ViewRoot the top of the ViewAndroid tree

ui/display/screen.h

Index: ui/display/screen.h
diff --git a/ui/display/screen.h b/ui/display/screen.h
index 3bff5bdb6406f2bb5256fb552cb8642c5951b2dd..def1328c1db387060e85c0b56c7d51884b0f65f6 100644
--- a/ui/display/screen.h
+++ b/ui/display/screen.h
@@ -60,6 +60,12 @@ class DISPLAY_EXPORT Screen {
   // 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;