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

chrome/browser/gtk/slide_animator_gtk.cc

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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/slide_animator_gtk.h"
 
 #include "app/animation.h"
 #include "app/slide_animation.h"
 #include "base/logging.h"
 
 #include "chrome/browser/gtk/gtk_expanded_container.h"
@@ skipping 41 matching lines @@
   // position here is that the widget is currently unallocated and may not
   // even have a size request.
   g_signal_connect(child, "size-allocate",
                    G_CALLBACK(OnChildSizeAllocate), this);
 
   child_needs_move_ = (direction == DOWN);
 
   animation_.reset(new SlideAnimation(this));
   // Default tween type is EASE_OUT.
   if (linear)
-    animation_->SetTweenType(SlideAnimation::NONE);
+    animation_->SetTweenType(Tween::LINEAR);
   if (duration != 0)
     animation_->SetSlideDuration(duration);
 }
 
 SlideAnimatorGtk::~SlideAnimatorGtk() {
   widget_.Destroy();
 }
 
 void SlideAnimatorGtk::Open() {
   if (!animations_enabled_)
@@ skipping 30 matching lines @@
 
 bool SlideAnimatorGtk::IsShowing() {
   return animation_->IsShowing();
 }
 
 bool SlideAnimatorGtk::IsClosing() {
   return animation_->IsClosing();
 }
 
 bool SlideAnimatorGtk::IsAnimating() {
-  return animation_->IsAnimating();
+  return animation_->is_animating();
 }
 
 void SlideAnimatorGtk::AnimationProgressed(const Animation* animation) {
   GtkRequisition req;
   gtk_widget_size_request(child_, &req);
 
   int showing_height = static_cast<int>(req.height *
                                         animation_->GetCurrentValue());
   if (direction_ == DOWN) {
     gtk_expanded_container_move(GTK_EXPANDED_CONTAINER(widget_.get()),
@@ skipping 19 matching lines @@
 // static
 void SlideAnimatorGtk::OnChildSizeAllocate(GtkWidget* child,
                                            GtkAllocation* allocation,
                                            SlideAnimatorGtk* slider) {
   if (slider->child_needs_move_) {
     gtk_expanded_container_move(GTK_EXPANDED_CONTAINER(slider->widget()),
                                 child, 0, -allocation->height);
     slider->child_needs_move_ = false;
   }
 }