Refactors animation to allow for cleaner subclassing. I'm doing this

views/controls/button/custom_button.cc

 // Copyright (c) 2010 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 "app/throb_animation.h"
 #include "base/keyboard_codes.h"
 
 namespace views {
 
 // How long the hover animation takes if uninterrupted.
 static const int kHoverFadeDurationMs = 150;
 
 ////////////////////////////////////////////////////////////////////////////////
 // CustomButton, public:
 
 CustomButton::~CustomButton() {
 }
 
 void CustomButton::SetState(ButtonState state) {
   if (state != state_) {
-    if (animate_on_state_change_ || !hover_animation_->IsAnimating()) {
+    if (animate_on_state_change_ || !hover_animation_->is_animating()) {
       animate_on_state_change_ = true;
       if (state_ == BS_NORMAL && state == BS_HOT) {
         // Button is hovered from a normal state, start hover animation.
         hover_animation_->Show();
       } else if (state_ == BS_HOT && state == BS_NORMAL) {
         // Button is returning to a normal state from hover, start hover
         // fade animation.
         hover_animation_->Hide();
       } else {
         hover_animation_->Stop();
@@ skipping 213 matching lines @@
 
 bool CustomButton::IsHighlighted() const {
   return state_ == BS_HOT;
 }
 
 bool CustomButton::IsPushed() const {
   return state_ == BS_PUSHED;
 }
 
 }  // namespace views