Convert Aura to use ui::Event.

ash/tooltips/tooltip_controller.h

Index: ash/tooltips/tooltip_controller.h
===================================================================
--- ash/tooltips/tooltip_controller.h	(revision 150582)
+++ ash/tooltips/tooltip_controller.h	(working copy)
@@ -15,9 +15,6 @@
 #include "ui/gfx/point.h"
 
 namespace aura {
-class KeyEvent;
-class MouseEvent;
-class TouchEvent;
 class Window;
 namespace client {
 class DragDropClient;
@@ -46,13 +43,14 @@
 
   // 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;
-  virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
-                                              aura::TouchEvent* event) OVERRIDE;
+                                   ui::MouseEvent* event) OVERRIDE;
+  virtual ui::TouchStatus PreHandleTouchEvent(
+      aura::Window* target,
+      ui::TouchEventImpl* event) OVERRIDE;
   virtual ui::GestureStatus PreHandleGestureEvent(aura::Window* target,
-      aura::GestureEvent* event) OVERRIDE;
+      ui::GestureEventImpl* event) OVERRIDE;
 
   // Overridden from aura::WindowObserver.
   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;