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

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

 // Copyright (c) 2011 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/ui/views/infobars/before_translate_infobar.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/translate/translate_infobar_delegate.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 161 matching lines @@
   } else if (sender == never_translate_button_) {
     delegate->NeverTranslatePageLanguage();
   } else if (sender == always_translate_button_) {
     delegate->AlwaysTranslatePageLanguage();
   } else {
     TranslateInfoBarBase::ButtonPressed(sender, event);
   }
 }
 
 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) {
   if (source == language_menu_button_) {
     languages_menu_->RunMenuAt(pt, views::Menu2::ALIGN_TOPRIGHT);
   } else {
     DCHECK_EQ(options_menu_button_, source);
     options_menu_->RunMenuAt(pt, views::Menu2::ALIGN_TOPRIGHT);
   }
 }