Update uses of UTF conversions in chrome/common to use the base:: namespace.

chrome/common/extensions/extension_file_util.cc

 // 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.
 
 #include "chrome/common/extensions/extension_file_util.h"
 
 #include <map>
 #include <vector>
 
 #include "base/file_util.h"
@@ skipping 229 matching lines @@
                               const Extension* extension,
                               int error_message_id,
                               std::string* error) {
   for (ExtensionIconSet::IconMap::const_iterator iter = icon_set.map().begin();
        iter != icon_set.map().end();
        ++iter) {
     const base::FilePath path =
         extension->GetResource(iter->second).GetFilePath();
     if (!ValidateFilePath(path)) {
       *error = l10n_util::GetStringFUTF8(error_message_id,
-                                         UTF8ToUTF16(iter->second));
+                                         base::UTF8ToUTF16(iter->second));
       return false;
     }
   }
   return true;
 }
 
 bool ValidateExtension(const Extension* extension,
                        std::string* error,
                        std::vector<extensions::InstallWarning>* warnings) {
   // Ask registered manifest handlers to validate their paths.
@@ skipping 261 matching lines @@
     return base::FilePath();
   }
   return temp_path;
 }
 
 void DeleteFile(const base::FilePath& path, bool recursive) {
   base::DeleteFile(path, recursive);
 }
 
 }  // namespace extension_file_util