Keep only base/extractor.[cc|h].

common/lang.h

-// Copyright 2007-2010 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-
-#ifndef OMAHA_COMMON_LANG_H_
-#define OMAHA_COMMON_LANG_H_
-
-#include <atlstr.h>
-#include <map>
-#include <vector>
-#include "base/basictypes.h"
-
-namespace omaha {
-
-namespace lang {
-
-CString GetDefaultLanguage(bool is_system);
-LANGID GetDefaultLanguageID(bool is_system);
-
-CString GetLanguageForLangID(LANGID langid);
-
-bool IsLanguageIDSupported(LANGID langid);
-bool IsLanguageSupported(const CString& language);
-void GetSupportedLanguages(std::vector<CString>* codes);
-
-// Returnes requested_language if supported. Otherwise returns current user's
-// language if supported or "en" if both of them are not supported.
-CString GetLanguageForProcess(const CString& requested_language);
-
-// Returns the written language name for a given language. For most languages,
-// the names are exactly same. There are very few exceptions. For example, the
-// written language of zh-HK is zh-TW.
-CString GetWrittenLanguage(const CString& requested_language);
-
-// Returns whether a language and its corresponding supported language have
-// different names.
-bool DoesSupportedLanguageUseDifferentId(const CString& requested_language);
-
-}  // namespace lang
-
-}  // namespace omaha
-
-#endif  // OMAHA_COMMON_LANG_H_