aura: Add X11 host window management.

ui/aura/root_window_host.h

Index: ui/aura/root_window_host.h
diff --git a/ui/aura/root_window_host.h b/ui/aura/root_window_host.h
index b053a55fc4f69f33ec8fdfc084effad0d99e6841..db3ba33f8e22b9a18249a6362882fd5854b5957b 100644
--- a/ui/aura/root_window_host.h
+++ b/ui/aura/root_window_host.h
@@ -48,6 +48,9 @@ class RootWindowHost {
   // Returns the accelerated widget.
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() = 0;
 
+  // Returns the accelerated widget used for event processing.
+  virtual gfx::AcceleratedWidget GetAcceleratedWidgetUsedForEvents() = 0;
+
   // Shows the RootWindowHost.
   virtual void Show() = 0;
 
@@ -98,6 +101,7 @@ class RootWindowHost {
   // Posts |native_event| to the platform's event queue.
 #if !defined(OS_MACOSX)
   virtual void PostNativeEvent(const base::NativeEvent& native_event) = 0;
+  virtual bool DispatchNativeEvent(const base::NativeEvent& native_event) = 0;
 #endif
 
   // Called when the device scale factor of the root window has chagned.