Convert Aura to use ui::Event.

ash/system/tray/tray_bubble_view.h

Index: ash/system/tray/tray_bubble_view.h
===================================================================
--- ash/system/tray/tray_bubble_view.h	(revision 150582)
+++ ash/system/tray/tray_bubble_view.h	(working copy)
@@ -9,7 +9,7 @@
 #include "ui/aura/event_filter.h"
 #include "ui/views/bubble/bubble_delegate.h"
 
-namespace aura {
+namespace ui {
 class LocatedEvent;
 }
 
@@ -48,18 +48,18 @@
 
     // 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;
 
    private:
-    void ProcessLocatedEvent(const aura::LocatedEvent& event);
+    void ProcessLocatedEvent(const ui::LocatedEvent& event);
 
     views::Widget* widget_;
     views::View* tray_view_;