views: Add OnEnabledChanged() method to View class.

views/controls/native_control.h

Index: views/controls/native_control.h
diff --git a/views/controls/native_control.h b/views/controls/native_control.h
index 12739205b8a2bf2d5499342708f360db6defd0dd..9cf604e487989c6fe666143f3901cba174564799 100644
--- a/views/controls/native_control.h
+++ b/views/controls/native_control.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -38,7 +38,7 @@ class NativeControl : public View {
 
   // Overridden to properly set the native control state.
   virtual void SetVisible(bool f);
-  virtual void SetEnabled(bool enabled);
+  virtual void OnEnabledChanged();
 
   // Overridden to do nothing.
   virtual void OnPaint(gfx::Canvas* canvas);