Move UserScript and related into extensions namespace

chrome/browser/extensions/convert_user_script.cc

 // Copyright (c) 2012 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/browser/extensions/convert_user_script.h"
 
 #include <string>
 #include <vector>
 
 #include "base/base64.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/path_service.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/user_script_master.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/user_script.h"
 #include "crypto/sha2.h"
 #include "googleurl/src/gurl.h"
 
-using extensions::Extension;
-
 namespace keys = extension_manifest_keys;
 namespace values = extension_manifest_values;
 
+namespace extensions {
+
 scoped_refptr<Extension> ConvertUserScriptToExtension(
     const FilePath& user_script_path, const GURL& original_url,
     string16* error) {
   std::string content;
   if (!file_util::ReadFileToString(user_script_path, &content)) {
     *error = ASCIIToUTF16("Could not read source file.");
     return NULL;
   }
 
   if (!IsStringUTF8(content)) {
@@ skipping 138 matching lines @@
       &utf8_error);
   *error = UTF8ToUTF16(utf8_error);
   if (!extension) {
     NOTREACHED() << "Could not init extension " << *error;
     return NULL;
   }
 
   temp_dir.Take();  // The caller takes ownership of the directory.
   return extension;
 }
+
+}  // namespace extensions