Extensions: Move id_util functions to crx_file component.

extensions/common/id_util.h

-// Copyright (c) 2013 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 EXTENSIONS_COMMON_ID_UTIL_H_
-#define EXTENSIONS_COMMON_ID_UTIL_H_
-
-#include <string>
-
-namespace base {
-class FilePath;
-}
-
-namespace extensions {
-namespace id_util {
-
-// The number of bytes in a legal id.
-extern const size_t kIdSize;
-
-// Generates an extension ID from arbitrary input. The same input string will
-// always generate the same output ID.
-std::string GenerateId(const std::string& input);
-
-// Generate an ID for an extension in the given path.
-// Used while developing extensions, before they have a key.
-std::string GenerateIdForPath(const base::FilePath& path);
-
-// Normalize the path for use by the extension. On Windows, this will make
-// sure the drive letter is uppercase.
-base::FilePath MaybeNormalizePath(const base::FilePath& path);
-
-}  // namespace id_util
-}  // namespace extensions
-
-#endif  // EXTENSIONS_COMMON_ID_UTIL_H_