CommandLine: add a CopySwitchesFrom() for copying from another CommandLine

chrome/test/ui_test_utils.cc

 // Copyright (c) 2010 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/test/ui_test_utils.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 597 matching lines @@
 #endif
 }
 
 }  // anonymous namespace
 
 TestWebSocketServer::TestWebSocketServer(const FilePath& root_directory) {
   scoped_ptr<CommandLine> cmd_line(CreateWebSocketServerCommandLine());
   cmd_line->AppendSwitchWithValue("server", "start");
   cmd_line->AppendSwitch("chromium");
   cmd_line->AppendSwitch("register_cygwin");
-  cmd_line->AppendSwitchWithValue("root", root_directory.ToWStringHack());
+  cmd_line->AppendSwitchPath("root", root_directory);
   temp_dir_.CreateUniqueTempDir();
   websocket_pid_file_ = temp_dir_.path().AppendASCII("websocket.pid");
-  cmd_line->AppendSwitchWithValue("pidfile",
-                                  websocket_pid_file_.ToWStringHack());
+  cmd_line->AppendSwitchPath("pidfile", websocket_pid_file_);
   SetPythonPath();
   base::LaunchApp(*cmd_line.get(), true, false, NULL);
 }
 
 CommandLine* TestWebSocketServer::CreatePythonCommandLine() {
   return new CommandLine(FilePath(FILE_PATH_LITERAL("python")));
 }
 
 void TestWebSocketServer::SetPythonPath() {
   FilePath scripts_path;
@@ skipping 21 matching lines @@
 
   CommandLine* cmd_line = CreatePythonCommandLine();
   cmd_line->AppendLooseValue(script_path.ToWStringHack());
   return cmd_line;
 }
 
 TestWebSocketServer::~TestWebSocketServer() {
   scoped_ptr<CommandLine> cmd_line(CreateWebSocketServerCommandLine());
   cmd_line->AppendSwitchWithValue("server", "stop");
   cmd_line->AppendSwitch("chromium");
-  cmd_line->AppendSwitchWithValue("pidfile",
-                                  websocket_pid_file_.ToWStringHack());
+  cmd_line->AppendSwitchPath("pidfile", websocket_pid_file_);
   base::LaunchApp(*cmd_line.get(), true, false, NULL);
 }
 
 }  // namespace ui_test_utils