Convert Aura to use ui::Event.

ash/wm/event_rewriter_event_filter.h

Index: ash/wm/event_rewriter_event_filter.h
===================================================================
--- ash/wm/event_rewriter_event_filter.h	(revision 150582)
+++ ash/wm/event_rewriter_event_filter.h	(working copy)
@@ -28,15 +28,15 @@
  private:
   // Overridden from aura::EventFilter:
   virtual bool PreHandleKeyEvent(aura::Window* target,
-                                 aura::KeyEvent* event) OVERRIDE;
+                                 ui::KeyEvent* event) OVERRIDE;
   virtual bool PreHandleMouseEvent(aura::Window* target,
-                                   aura::MouseEvent* event) OVERRIDE;
+                                   ui::MouseEvent* event) OVERRIDE;
   virtual ui::TouchStatus PreHandleTouchEvent(
       aura::Window* target,
-      aura::TouchEvent* event) OVERRIDE;
+      ui::TouchEventImpl* event) OVERRIDE;
   virtual ui::GestureStatus PreHandleGestureEvent(
       aura::Window* target,
-      aura::GestureEvent* event) OVERRIDE;
+      ui::GestureEventImpl* event) OVERRIDE;
 
   scoped_ptr<EventRewriterDelegate> delegate_;