views: Remove dead code in CustomButton.

ui/views/controls/button/custom_button.cc

 // 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.
 
 #include "ui/views/controls/button/custom_button.h"
 
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/events/event.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/animation/throb_animation.h"
@@ skipping 55 matching lines @@
       // Button is returning to a normal state from hover, start hover
       // fade animation.
       hover_animation_->Hide();
     } else {
       hover_animation_->Stop();
     }
   }
 
   state_ = state;
   StateChanged();
-  if (state_changed_delegate_.get())
-    state_changed_delegate_->StateChanged(state_);
   SchedulePaint();
 }
 
 void CustomButton::StartThrobbing(int cycles_til_stop) {
   is_throbbing_ = true;
   hover_animation_->StartThrobbing(cycles_til_stop);
 }
 
 void CustomButton::StopThrobbing() {
   if (hover_animation_->is_animating()) {
@@ skipping 258 matching lines @@
   if (!details.is_add && state_ != STATE_DISABLED)
     SetState(STATE_NORMAL);
 }
 
 void CustomButton::OnBlur() {
   if (IsHotTracked())
     SetState(STATE_NORMAL);
 }
 
 }  // namespace views