views: Add OnEnabledChanged() method to View class.

views/controls/button/custom_button.cc

 // 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.
 
 #include "views/controls/button/custom_button.h"
 
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/animation/throb_animation.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "views/screen.h"
@@ skipping 73 matching lines @@
   if (flag && GetWidget()) {
     GetWidget()->NotifyAccessibilityEvent(
         this, ui::AccessibilityTypes::EVENT_FOCUS, true);
   }
 }
 
 bool CustomButton::IsHotTracked() const {
   return state_ == BS_HOT;
 }
 
-void CustomButton::SetEnabled(bool enabled) {
-  if (enabled ? (state_ != BS_DISABLED) : (state_ == BS_DISABLED))
+void CustomButton::OnEnabledChanged() {
+  if (View::IsEnabled() ? (state_ != BS_DISABLED) : (state_ == BS_DISABLED))
     return;
 
-  if (enabled)
+  if (View::IsEnabled())
     SetState(IsMouseHovered() ? BS_HOT : BS_NORMAL);
   else
     SetState(BS_DISABLED);
 }
 
 bool CustomButton::IsEnabled() const {
   return state_ != BS_DISABLED;
 }
 
 std::string CustomButton::GetClassName() const {
@@ skipping 172 matching lines @@
 bool CustomButton::IsFocusable() const {
   return (state_ != BS_DISABLED) && View::IsFocusable();
 }
 
 void CustomButton::OnBlur() {
   if (IsHotTracked())
     SetState(BS_NORMAL);
 }
 
 }  // namespace views