Extensions: Move id_util functions to crx_file component.

extensions/common/extension.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_EXTENSION_H_
 #define EXTENSIONS_COMMON_EXTENSION_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
@@ skipping 184 matching lines @@
 
   // Valid schemes for web extent URLPatterns.
   static const int kValidWebExtentSchemes;
 
   // Valid schemes for host permission URLPatterns.
   static const int kValidHostPermissionSchemes;
 
   // The mimetype used for extensions.
   static const char kMimeType[];
 
-  // Checks to see if the extension has a valid ID.
-  static bool IdIsValid(const std::string& id);
-
   // See Type definition in Manifest.
   Manifest::Type GetType() const;
 
   // Returns an absolute url to a resource inside of an extension. The
   // |extension_url| argument should be the url() from an Extension object. The
   // |relative_path| can be untrusted user input. The returned URL will either
   // be invalid() or a child of |extension_url|.
   // NOTE: Static so that it can be used from multiple threads.
   static GURL GetResourceURL(const GURL& extension_url,
                              const std::string& relative_path);
@@ skipping 349 matching lines @@
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EXTENSION_H_