Convert Aura to use ui::Event.

ui/aura/focus_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_AURA_FOCUS_MANAGER_H_
 #define UI_AURA_FOCUS_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "base/observer_list.h"
 #include "ui/aura/aura_export.h"
 
+namespace ui {
+class Event;
+}
+
 namespace aura {
 
-class Event;
 class FocusChangeObserver;
 class Window;
 
 // An interface implemented by the Desktop to expose the focused window and
 // allow for it to be changed.
 class AURA_EXPORT FocusManager {
  public:
   FocusManager();
   ~FocusManager();
 
   void AddObserver(FocusChangeObserver* observer);
   void RemoveObserver(FocusChangeObserver* observer);
 
   // Sets the currently focused window. Before the currently focused window is
   // changed, the previous focused window's delegate is sent a blur
   // notification, and after it is changed the new focused window is sent a
   // focused notification. Nothing happens if |window| and GetFocusedWindow()
   // match.
-  void SetFocusedWindow(Window* window, const Event* event);
+  void SetFocusedWindow(Window* window, const ui::Event* event);
 
   // Returns the currently focused window or NULL if there is none.
   Window* GetFocusedWindow();
 
   // Returns true if |window| is the focused window.
   bool IsFocusedWindow(const Window* window) const;
 
  protected:
   aura::Window* focused_window_;
 
   ObserverList<FocusChangeObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(FocusManager);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_FOCUS_MANAGER_H_