[components] Apply automatic range checks to content enum types across IPC

components/translate/core/common/translate_errors.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_TRANSLATE_CORE_COMMON_TRANSLATE_ERRORS_H_
 #define COMPONENTS_TRANSLATE_CORE_COMMON_TRANSLATE_ERRORS_H_
 
 #include "base/basictypes.h"
 
 namespace translate {
@@ skipping 14 matching lines @@
     UNSUPPORTED_LANGUAGE,     // The server detected a language that the browser
                               // does not know.
     IDENTICAL_LANGUAGES,      // The original and target languages are the same.
     TRANSLATION_ERROR,        // An error was reported by the translation script
                               // during translation.
     TRANSLATION_TIMEOUT,      // The library doesn't finish the translation.
     UNEXPECTED_SCRIPT_ERROR,  // The library raises an unexpected exception.
     BAD_ORIGIN,               // The library is blocked because of bad origin.
     SCRIPT_LOAD_ERROR,        // Loader fails to load a dependent JavaScript.
     TRANSLATE_ERROR_MAX,
+    TYPE_LAST = TRANSLATE_ERROR_MAX
   };
 
  private:
   TranslateErrors() {}
 
   DISALLOW_COPY_AND_ASSIGN(TranslateErrors);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_CORE_COMMON_TRANSLATE_ERRORS_H_