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

chrome/browser/gtk/hover_controller_gtk.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 "chrome/browser/gtk/hover_controller_gtk.h"
 
 #include "base/message_loop.h"
 #include "chrome/browser/gtk/gtk_chrome_button.h"
 
 static const gchar* kHoverControllerGtkKey = "__HOVER_CONTROLLER_GTK__";
@@ skipping 49 matching lines @@
   button_ = NULL;
 
   delete this;
 }
 
 void HoverControllerGtk::AnimationProgressed(const Animation* animation) {
   if (!button_)
     return;
 
   // Ignore the hover animation if we are throbbing.
-  if (animation == &hover_animation_ && throb_animation_.IsAnimating())
+  if (animation == &hover_animation_ && throb_animation_.is_animating())
     return;
 
   gtk_chrome_button_set_hover_state(GTK_CHROME_BUTTON(button_),
                                     animation->GetCurrentValue());
 }
 
 void HoverControllerGtk::AnimationEnded(const Animation* animation) {
   if (!button_)
     return;
   if (animation != &throb_animation_)
@@ skipping 23 matching lines @@
   } else {
     hover_animation_.Hide();
   }
 
   return FALSE;
 }
 
 void HoverControllerGtk::OnDestroy(GtkWidget* widget) {
   Destroy();
 }