Move CommandLine to base namespace.

chrome/test/base/test_launcher_utils.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_TEST_BASE_TEST_LAUNCHER_UTILS_H_
 #define CHROME_TEST_BASE_TEST_LAUNCHER_UTILS_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 
+namespace base {
 class CommandLine;
+}
 
 // A set of utilities for test code that launches separate processes.
 namespace test_launcher_utils {
 
 // Appends browser switches to provided |command_line| to be used
 // when running under tests.
-void PrepareBrowserCommandLineForTests(CommandLine* command_line);
+void PrepareBrowserCommandLineForTests(base::CommandLine* command_line);
 
 // Overrides the current process' user data dir.
 bool OverrideUserDataDir(
     const base::FilePath& user_data_dir) WARN_UNUSED_RESULT;
 
 }  // namespace test_launcher_utils
 
 #endif  // CHROME_TEST_BASE_TEST_LAUNCHER_UTILS_H_