Fix to make Chromium more verbose about component extension loading error

chrome/common/extensions/extension_file_util.h

 // Copyright (c) 2011 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 CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
 #pragma once
 
 #include <string>
 #include <map>
@@ skipping 26 matching lines @@
 
 // Loads and validates an extension from the specified directory. Returns NULL
 // on failure, with a description of the error in |error|.
 scoped_refptr<Extension> LoadExtension(const FilePath& extension_root,
                                        Extension::Location location,
                                        int flags,
                                        std::string* error);
 
 // Returns true if the given extension object is valid and consistent.
 // Otherwise, a description of the error is returned in |error|.
-bool ValidateExtension(Extension* extension, std::string* error);
+bool ValidateExtension(const Extension* extension, std::string* error);
 
 // Cleans up the extension install directory. It can end up with garbage in it
 // if extensions can't initially be removed when they are uninstalled (eg if a
 // file is in use).
 //
 // |extensions_dir| is the install directory to look in. |extension_paths| is a
 // map from extension id to full installation path.
 //
 // Obsolete version directories are removed, as are directories that aren't
 // found in |extension_paths|.
@@ skipping 25 matching lines @@
 FilePath GetUserDataTempDir();
 
 // Helper function to delete files. This is used to avoid ugly casts which
 // would be necessary with PostMessage since file_util::Delete is overloaded.
 // TODO(skerner): Make a version of Delete that is not overloaded in file_util.
 void DeleteFile(const FilePath& path, bool recursive);
 
 }  // namespace extension_file_util
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_