Convert some more view methods to the ui/views style.

chrome/browser/ui/views/infobars/infobar_view.cc

Index: chrome/browser/ui/views/infobars/infobar_view.cc
===================================================================
--- chrome/browser/ui/views/infobars/infobar_view.cc	(revision 92600)
+++ chrome/browser/ui/views/infobars/infobar_view.cc	(working copy)
@@ -230,7 +230,7 @@
     AddChildView(close_button_);
   } else if ((close_button_ != NULL) && (parent == this) &&
       (child != close_button_) && (close_button_->parent() == this) &&
-      (GetChildViewAt(child_count() - 1) != close_button_)) {
+      (child_at(child_count() - 1) != close_button_)) {
     // For accessibility, ensure the close button is the last child view.
     RemoveChildView(close_button_);
     AddChildView(close_button_);