aura: Add X11 host window management.

ui/aura/root_window_host_linux.h

Index: ui/aura/root_window_host_linux.h
diff --git a/ui/aura/root_window_host_linux.h b/ui/aura/root_window_host_linux.h
index 9d045eb0b42f1221f889b420607b0bd978d297c8..382c5dbe078fafa2370e9221bdde0fb55e0314a9 100644
--- a/ui/aura/root_window_host_linux.h
+++ b/ui/aura/root_window_host_linux.h
@@ -36,6 +36,7 @@ class RootWindowHostLinux : public RootWindowHost,
   virtual void SetRootWindow(RootWindow* root_window) OVERRIDE;
   virtual RootWindow* GetRootWindow() OVERRIDE;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;
+  virtual gfx::AcceleratedWidget GetAcceleratedWidgetUsedForEvents() OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual void ToggleFullScreen() OVERRIDE;
   virtual gfx::Rect GetBounds() const OVERRIDE;
@@ -54,6 +55,7 @@ class RootWindowHostLinux : public RootWindowHost,
       const gfx::Rect& snapshot_bounds,
       std::vector<unsigned char>* png_representation) OVERRIDE;
   virtual void PostNativeEvent(const base::NativeEvent& event) OVERRIDE;
+  virtual bool DispatchNativeEvent(const base::NativeEvent& event) OVERRIDE;
   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
 
   // Returns true if there's an X window manager present... in most cases.  Some
@@ -70,6 +72,7 @@ class RootWindowHostLinux : public RootWindowHost,
   // The display and the native X window hosting the root window.
   Display* xdisplay_;
   ::Window xwindow_;
+  ::Window x_output_window_;
 
   // The native root window.
   ::Window x_root_window_;