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

chrome/browser/jumplist_win.cc

 // Copyright (c) 2006-2009 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/jumplist_win.h"
 
 #include <windows.h>
 #include <shobjidl.h>
 #include <propkey.h>
 #include <propvarutil.h>
@@ skipping 404 matching lines @@
   if (FAILED(result))
     return false;
 
   // Retrieve the absolute path to "chrome.exe".
   std::wstring chrome_path;
   if (!PathService::Get(base::FILE_EXE, &chrome_path))
     return false;
 
   // Retrieve the command-line switches of this process.
   CommandLine command_line(CommandLine::ARGUMENTS_ONLY);
-  std::wstring user_data_dir = CommandLine::ForCurrentProcess()->
-      GetSwitchValue(switches::kUserDataDir);
+  FilePath user_data_dir = CommandLine::ForCurrentProcess()->
+      GetSwitchValuePath(switches::kUserDataDir);
   if (!user_data_dir.empty())
-    command_line.AppendSwitchWithValue(switches::kUserDataDir, user_data_dir);
+    command_line.AppendSwitchPath(switches::kUserDataDir, user_data_dir);
 
   std::wstring chrome_switches = command_line.command_line_string();
 
   // We allocate 60% of the given JumpList slots to "most-visited" items
   // and 40% to "recently-closed" items, respectively.
   // Nevertheless, if there are not so many items in |recently_closed_pages|,
   // we give the remaining slots to "most-visited" items.
   const int kMostVisited = 60;
   const int kRecentlyClosed = 40;
   const int kTotal = kMostVisited + kRecentlyClosed;
@@ skipping 333 matching lines @@
   // the file thread.
   ChromeThread::PostTask(
       ChromeThread::FILE, FROM_HERE,
       new JumpListUpdateTask(app_id_.c_str(), icon_dir_, most_visited_pages_,
                              recently_closed_pages_));
 
   // Delete all items in these lists since we don't need these lists any longer.
   most_visited_pages_.clear();
   recently_closed_pages_.clear();
 }