events: Move EventTarget into Event.

ui/base/events/event_target.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_BASE_EVENTS_EVENT_CONSTANTS_EVENTS_EVENT_TARGET_H_
 #define UI_BASE_EVENTS_EVENT_CONSTANTS_EVENTS_EVENT_TARGET_H_
 
 #include "base/compiler_specific.h"
 #include "ui/base/events/event_handler.h"
 #include "ui/base/ui_export.h"
@@ skipping 39 matching lines @@
   // target. The handlers from the outermost target are first in the list, and
   // the handlers on |this| are the last in the list.
   void GetPreTargetHandlers(EventHandlerList* list);
 
   // Returns the list of handlers that should receive the event after the
   // target. The handlers from the outermost target are last in the list, and
   // the handlers on |this| are the first in the list.
   void GetPostTargetHandlers(EventHandlerList* list);
 
   // Overridden from EventHandler:
-  virtual EventResult OnKeyEvent(EventTarget* target,
-                                 KeyEvent* event) OVERRIDE;
-  virtual EventResult OnMouseEvent(EventTarget* target,
-                                   MouseEvent* event) OVERRIDE;
-  virtual EventResult OnScrollEvent(EventTarget* target,
-                                    ScrollEvent* event) OVERRIDE;
-  virtual TouchStatus OnTouchEvent(EventTarget* target,
-                                   TouchEvent* event) OVERRIDE;
-  virtual EventResult OnGestureEvent(EventTarget* target,
-                                     GestureEvent* event) OVERRIDE;
+  virtual EventResult OnKeyEvent(KeyEvent* event) OVERRIDE;
+  virtual EventResult OnMouseEvent(MouseEvent* event) OVERRIDE;
+  virtual EventResult OnScrollEvent(ScrollEvent* event) OVERRIDE;
+  virtual TouchStatus OnTouchEvent(TouchEvent* event) OVERRIDE;
+  virtual EventResult OnGestureEvent(GestureEvent* event) OVERRIDE;
 
   EventHandlerList pre_target_list_;
   EventHandlerList post_target_list_;
   EventHandler* target_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(EventTarget);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_EVENTS_EVENT_CONSTANTS_EVENTS_EVENT_TARGET_H_