infobars: Use TCW directly in InfoBar to remove the delegate.

chrome/browser/tab_contents/infobar_container.cc

Index: chrome/browser/tab_contents/infobar_container.cc
diff --git a/chrome/browser/tab_contents/infobar_container.cc b/chrome/browser/tab_contents/infobar_container.cc
index 6541c250e1ded796037394fedf10925a5d27419e..6e9d02e76ceecf1f92cb48f3162f804008b86421 100644
--- a/chrome/browser/tab_contents/infobar_container.cc
+++ b/chrome/browser/tab_contents/infobar_container.cc
@@ -96,10 +96,6 @@ void InfoBarContainer::OnInfoBarStateChanged(bool is_animating) {
     delegate_->InfoBarContainerStateChanged(is_animating);
 }
 
-void InfoBarContainer::RemoveDelegate(InfoBarDelegate* delegate) {
-  tab_contents_->RemoveInfoBar(delegate);
-}
-
 void InfoBarContainer::RemoveInfoBar(InfoBar* infobar) {
   InfoBars::iterator infobar_iterator(std::find(infobars_.begin(),
                                                 infobars_.end(), infobar));