Change InfoBar-related notifications to be sourced from a TabContentsWrapper, not a TabContents. ...

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

Index: chrome/browser/ui/views/infobars/before_translate_infobar.cc
===================================================================
--- chrome/browser/ui/views/infobars/before_translate_infobar.cc	(revision 87541)
+++ chrome/browser/ui/views/infobars/before_translate_infobar.cc	(working copy)
@@ -179,7 +179,12 @@
 }
 
 void BeforeTranslateInfoBar::OriginalLanguageChanged() {
-  UpdateLanguageButtonText(language_menu_button_, LanguagesMenuModel::ORIGINAL);
+  // Tests can call this function when the infobar has never been added to a
+  // view hierarchy and thus there is no button.
+  if (language_menu_button_) {
+    UpdateLanguageButtonText(language_menu_button_,
+                             LanguagesMenuModel::ORIGINAL);
+  }
 }
 
 void BeforeTranslateInfoBar::RunMenu(View* source, const gfx::Point& pt) {