Fix to make Chromium more verbose about component extension loading error

chrome/common/extensions/extension_file_util.cc

 // 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.
 
 #include "chrome/common/extensions/extension_file_util.h"
 
 #include <map>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 121 matching lines @@
       error));
   if (!extension.get())
     return NULL;
 
   if (!ValidateExtension(extension.get(), error))
     return NULL;
 
   return extension;
 }
 
-bool ValidateExtension(Extension* extension, std::string* error) {
+bool ValidateExtension(const Extension* extension, std::string* error) {
   // Validate icons exist.
   for (ExtensionIconSet::IconMap::const_iterator iter =
            extension->icons().map().begin();
        iter != extension->icons().map().end();
        ++iter) {
     const FilePath path = extension->GetResource(iter->second).GetFilePath();
     if (!file_util::PathExists(path)) {
       *error =
           l10n_util::GetStringFUTF8(IDS_EXTENSION_LOAD_ICON_FAILED,
                                     UTF8ToUTF16(iter->second));
@@ skipping 461 matching lines @@
     return temp_path;
 
   return FilePath();
 }
 
 void DeleteFile(const FilePath& path, bool recursive) {
   file_util::Delete(path, recursive);
 }
 
 }  // namespace extension_file_util