CommandLine API rework

chrome/app/chrome_main_uitest.cc

 // Copyright (c) 2006-2008 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/chrome_constants.h"
 #include "chrome/test/ui/ui_test.h"
 
 typedef UITest ChromeMainTest;
 
 // Launch the app, then close the app.
@@ skipping 17 matching lines @@
   EXPECT_EQ(1, window_count);
 
   EXPECT_EQ(1, GetTabCount());
 }
 
 // Make sure that the second invocation creates a new window.
 TEST_F(ChromeMainTest, SecondLaunch) {
   include_testing_id_ = false;
   use_existing_browser_ = true;
 
-  LaunchBrowser(std::wstring(), false);
+  LaunchBrowser(CommandLine(L""), false);
 
   int window_count;
   ASSERT_TRUE(automation()->WaitForWindowCountToChange(1, &window_count,
                                                        action_timeout_ms()));
   ASSERT_EQ(2, window_count);
 }