views: Remove dead code in CustomButton.

ui/views/controls/button/custom_button.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_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 #define UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/animation/animation_delegate.h"
 #include "ui/views/controls/button/button.h"
 
 namespace gfx {
 class ThrobAnimation;
 }
 
 namespace views {
 
-class CustomButtonStateChangedDelegate;
-
 // A button with custom rendering. The base of ImageButton and LabelButton.
 // Note that this type of button is not focusable by default and will not be
 // part of the focus chain.  Call SetFocusable(true) to make it part of the
 // focus chain.
 class VIEWS_EXPORT CustomButton : public Button,
                                   public gfx::AnimationDelegate {
  public:
   // The menu button's class name.
   static const char kViewClassName[];
 
@@ skipping 51 matching lines @@
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
   void ShowContextMenu(const gfx::Point& p,
                        ui::MenuSourceType source_type) override;
   void OnDragDone() override;
   void GetAccessibleState(ui::AXViewState* state) override;
   void VisibilityChanged(View* starting_from, bool is_visible) override;
 
   // Overridden from gfx::AnimationDelegate:
   void AnimationProgressed(const gfx::Animation* animation) override;
 
-  // Takes ownership of the delegate.
-  void set_state_changed_delegate(CustomButtonStateChangedDelegate* delegate) {
-    state_changed_delegate_.reset(delegate);
-  }
-
  protected:
   // Construct the Button with a Listener. See comment for Button's ctor.
   explicit CustomButton(ButtonListener* listener);
 
   // Invoked from SetState() when SetState() is passed a value that differs from
   // the current state. CustomButton's implementation of StateChanged() does
   // nothing; this method is provided for subclasses that wish to do something
   // on state changes.
   virtual void StateChanged();
 
@@ skipping 23 matching lines @@
 
   // Is the hover animation running because StartThrob was invoked?
   bool is_throbbing_;
 
   // Mouse event flags which can trigger button actions.
   int triggerable_event_flags_;
 
   // See description above setter.
   bool request_focus_on_press_;
 
-  scoped_ptr<CustomButtonStateChangedDelegate> state_changed_delegate_;
-
   DISALLOW_COPY_AND_ASSIGN(CustomButton);
 };
 
-// Delegate for actions taken on state changes by CustomButton.
-class VIEWS_EXPORT CustomButtonStateChangedDelegate {
-public:
-  virtual ~CustomButtonStateChangedDelegate() {}
-  virtual void StateChanged(Button::ButtonState state) = 0;
-
-protected:
-  CustomButtonStateChangedDelegate() {}
-
-private:
-  DISALLOW_COPY_AND_ASSIGN(CustomButtonStateChangedDelegate);
-};
-
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_CUSTOM_BUTTON_H_