Bandaid around a weird crasher were we end up with a NULL infobar.

chrome/browser/translate/translate_manager.cc

 // Copyright (c) 2010 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/translate/translate_manager.h"
 
 #include "app/resource_bundle.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/histogram.h"
@@ skipping 590 matching lines @@
       GetLanguageCode(g_browser_process->GetApplicationLocale());
   if (IsSupportedLanguage(target_lang))
     return target_lang;
   return std::string();
 }
 
 // static
 TranslateInfoBarDelegate* TranslateManager::GetTranslateInfoBarDelegate(
     TabContents* tab) {
   for (int i = 0; i < tab->infobar_delegate_count(); ++i) {
-    TranslateInfoBarDelegate* delegate =
-        tab->GetInfoBarDelegateAt(i)->AsTranslateInfoBarDelegate();
-    if (delegate)
-      return delegate;
+    InfoBarDelegate* delegate = tab->GetInfoBarDelegateAt(i);
+    if (!delegate) {
+      // Please let jcivelli know if you hit this and how you got to that point.
+      NOTREACHED();
+      continue;
+    }
+    TranslateInfoBarDelegate* translate_delegate =
+        delegate->AsTranslateInfoBarDelegate();
+    if (translate_delegate)
+      return translate_delegate;
   }
   return NULL;
 }