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

chrome/browser/gtk/tabs/dragged_tab_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/tabs/dragged_tab_gtk.h"
 
 #include <gdk/gdk.h>
 
 #include <algorithm>
 
@@ skipping 107 matching lines @@
 
   gint x, y, width, height;
   gdk_window_get_origin(container_->window, &x, &y);
   gdk_window_get_geometry(container_->window, NULL, NULL,
                           &width, &height, NULL);
 
   animation_start_bounds_ = gfx::Rect(x, y, width, height);
   animation_end_bounds_ = bounds;
 
   close_animation_.SetSlideDuration(kAnimateToBoundsDurationMs);
-  close_animation_.SetTweenType(SlideAnimation::EASE_OUT);
+  close_animation_.SetTweenType(Tween::EASE_OUT);
   if (!close_animation_.IsShowing()) {
     close_animation_.Reset();
     close_animation_.Show();
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DraggedTabGtk, AnimationDelegate implementation:
 
 void DraggedTabGtk::AnimationProgressed(const Animation* animation) {
@@ skipping 188 matching lines @@
   cairo_set_source_surface(cr, surface, 0, 0);
   cairo_paint(cr);
 
   cairo_destroy(cr);
 
   cairo_surface_destroy(surface);
 
   // We've already drawn the tab, so don't propagate the expose-event signal.
   return TRUE;
 }