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

chrome/browser/views/infobars/translate_infobars.cc

Index: chrome/browser/views/infobars/translate_infobars.cc
diff --git a/chrome/browser/views/infobars/translate_infobars.cc b/chrome/browser/views/infobars/translate_infobars.cc
index 3bebe906fc3c93055cc8f9214cfbf68d7f38fc4e..7cc9f114e5fa6a3a2124566845da78ade0148dba 100644
--- a/chrome/browser/views/infobars/translate_infobars.cc
+++ b/chrome/browser/views/infobars/translate_infobars.cc
@@ -261,7 +261,7 @@ TranslateInfoBar::TranslateInfoBar(TranslateInfoBarDelegate* delegate)
 
   // 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.
@@ -564,7 +564,7 @@ void TranslateInfoBar::Layout() {
 
 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;
   }