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

chrome/browser/views/infobars/infobars.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/views/infobars/infobars.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "app/slide_animation.h"
 #if defined(OS_WIN)
@@ skipping 118 matching lines @@
   close_button_->SetImage(views::CustomButton::BS_NORMAL,
                           rb.GetBitmapNamed(IDR_CLOSE_BAR));
   close_button_->SetImage(views::CustomButton::BS_HOT,
                           rb.GetBitmapNamed(IDR_CLOSE_BAR_H));
   close_button_->SetImage(views::CustomButton::BS_PUSHED,
                           rb.GetBitmapNamed(IDR_CLOSE_BAR_P));
   close_button_->SetAccessibleName(l10n_util::GetString(IDS_ACCNAME_CLOSE));
   AddChildView(close_button_);
 
   animation_.reset(new SlideAnimation(this));
-  animation_->SetTweenType(SlideAnimation::NONE);
+  animation_->SetTweenType(Tween::LINEAR);
 }
 
 InfoBar::~InfoBar() {
 }
 
 void InfoBar::AnimateOpen() {
   animation_->Show();
 }
 
 void InfoBar::Open() {
@@ skipping 441 matching lines @@
 
 InfoBar* LinkInfoBarDelegate::CreateInfoBar() {
   return new LinkInfoBar(this);
 }
 
 // ConfirmInfoBarDelegate, InfoBarDelegate overrides: --------------------------
 
 InfoBar* ConfirmInfoBarDelegate::CreateInfoBar() {
   return new ConfirmInfoBar(this);
 }