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

chrome/browser/views/infobars/translate_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/translate_infobars.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "app/l10n_util.h"
@@ skipping 243 matching lines @@
   set_background(NULL);
 
   // Initialize backgrounds.
   normal_background_.reset(
       new InfoBarBackground(InfoBarDelegate::PAGE_ACTION_TYPE));
   error_background_.reset(
       new InfoBarBackground(InfoBarDelegate::ERROR_TYPE));
 
   // Initialize slide animation for transitioning to and from error state.
   error_animation_.reset(new SlideAnimation(this));
-  error_animation_->SetTweenType(SlideAnimation::NONE);
+  error_animation_->SetTweenType(Tween::LINEAR);
   error_animation_->SetSlideDuration(500);
 
   // Initialize icon.
   icon_ = new views::ImageView;
   SkBitmap* image = delegate->GetIcon();
   if (image)
     icon_->SetImage(image);
   AddChildView(icon_);
 
   // Create original language menu button.
@@ skipping 282 matching lines @@
   if (translation_pending_) {
     translating_label_->SetBounds(
         prev_right + InfoBar::kEndOfLabelSpacing,
         InfoBar::OffsetY(this, translating_ps),
         translating_width, translating_ps.height());
   }
 }
 
 void TranslateInfoBar::PaintBackground(gfx::Canvas* canvas) {
   // If we're not animating, simply paint background for current state.
-  if (!error_animation_->IsAnimating()) {
+  if (!error_animation_->is_animating()) {
     GetBackground(state_)->Paint(canvas, this);
     return;
   }
 
   // Animate cross-fading between error and normal states;
   // since all normal states use the same background, just use kAfterTranslate.
   if (error_animation_->IsShowing()) {  // Transitioning to error state.
     // Fade out normal state.
     FadeBackground(canvas, 1.0 - error_animation_->GetCurrentValue(),
         TranslateInfoBarDelegate::kAfterTranslate);
@@ skipping 394 matching lines @@
 inline int TranslateInfoBar::GetSpacingAfterFirstLanguageButton() const {
   return (state_ == TranslateInfoBarDelegate::kAfterTranslate ?
       kButtonInLabelSpacing : 10);
 }
 
 // TranslateInfoBarDelegate, InfoBarDelegate overrides: ------------------
 
 InfoBar* TranslateInfoBarDelegate::CreateInfoBar() {
   return new TranslateInfoBar(this);
 }