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

views/controls/button/image_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/image_button.h"
 
 #include "app/throb_animation.h"
 #include "gfx/canvas.h"
 #include "gfx/skbitmap_operations.h"
 
@@ skipping 75 matching lines @@
   }
   PaintFocusBorder(canvas);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ImageButton, protected:
 
 SkBitmap ImageButton::GetImageToPaint() {
   SkBitmap img;
 
-  if (!images_[BS_HOT].isNull() && hover_animation_->IsAnimating()) {
+  if (!images_[BS_HOT].isNull() && hover_animation_->is_animating()) {
     img = SkBitmapOperations::CreateBlendedBitmap(images_[BS_NORMAL],
         images_[BS_HOT], hover_animation_->GetCurrentValue());
   } else {
     img = images_[state_];
   }
 
   return !img.isNull() ? img : images_[BS_NORMAL];
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 53 matching lines @@
 bool ToggleImageButton::GetTooltipText(const gfx::Point& p,
                                        std::wstring* tooltip) {
   if (!toggled_ || toggled_tooltip_text_.empty())
     return Button::GetTooltipText(p, tooltip);
 
   *tooltip = toggled_tooltip_text_;
   return true;
 }
 
 }  // namespace views