Convert Aura to use ui::Event.

ui/gfx/native_widget_types.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_GFX_NATIVE_WIDGET_TYPES_H_
 #define UI_GFX_NATIVE_WIDGET_TYPES_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_ANDROID)
@@ skipping 28 matching lines @@
 //
 // The name 'View' here meshes with OS X where the UI elements are called
 // 'views' and with our Chrome UI code where the elements are also called
 // 'views'.
 
 #if defined(USE_AURA)
 #include "ui/base/cursor/cursor.h"
 
 class SkRegion;
 namespace aura {
+class Window;
+}
+namespace ui {
 class Event;
-class Window;
 }
 #endif  // defined(USE_AURA)
 
 #if defined(OS_WIN)
 #include <windows.h>  // NOLINT
 typedef struct HFONT__* HFONT;
 struct IAccessible;
 #elif defined(OS_MACOSX)
 struct CGContext;
 #ifdef __OBJC__
@@ skipping 33 matching lines @@
 #endif
 class SkBitmap;
 
 namespace gfx {
 
 #if defined(USE_AURA)
 typedef ui::Cursor NativeCursor;
 typedef aura::Window* NativeView;
 typedef aura::Window* NativeWindow;
 typedef SkRegion* NativeRegion;
-typedef aura::Event* NativeEvent;
+typedef ui::Event* NativeEvent;
 #elif defined(OS_WIN)
 typedef HCURSOR NativeCursor;
 typedef HWND NativeView;
 typedef HWND NativeWindow;
 typedef HRGN NativeRegion;
 typedef MSG NativeEvent;
 #elif defined(OS_MACOSX)
 typedef NSCursor* NativeCursor;
 typedef NSView* NativeView;
 typedef NSWindow* NativeWindow;
@@ skipping 168 matching lines @@
 #elif defined(OS_ANDROID)
 typedef ANativeWindow* AcceleratedWidget;
 const AcceleratedWidget kNullAcceleratedWidget = 0;
 #else
 #error unknown platform
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_WIDGET_TYPES_H_