Use GetSwitchValuePath.

chrome/test/memory_test/memory_test.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 "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/process_util.h"
@@ skipping 65 matching lines @@
     // will be populated with an appropriate cache set.  If any of source
     // urls are particularly slow, setting |kMaxWaitTime| higher while record
     // may be useful.
     bool playback = true;
     if (playback) {
       // Use the playback cache, but don't use playback events.
       launch_arguments_.AppendSwitch(switches::kPlaybackMode);
       launch_arguments_.AppendSwitch(switches::kNoEvents);
 
       // Get the specified user data dir (optional)
-      FilePath profile_dir = FilePath::FromWStringHack(
-          CommandLine::ForCurrentProcess()->GetSwitchValue(
-          switches::kUserDataDir));
+      FilePath profile_dir =
+          CommandLine::ForCurrentProcess()->GetSwitchValuePath(
+          switches::kUserDataDir);
 
       if (profile_dir.empty()) {
         if (!SetupTempDirectory(GetUserDataDirSource())) {
           // There isn't really a way to fail gracefully here.
           // Neither this constructor nor the SetUp() method return
           // status to the caller.  So, just fall through using the
           // default profile and log this.  The failure will be
           // obvious.
           LOG(ERROR) << "Error preparing temp directory for test";
         }
@@ skipping 545 matching lines @@
 TEST_F(GeneralMixMemoryTest, TwelveTabTest) {
   RunTest("12t", 12);
 }
 
 // Commented out until the recorded cache data is added.
 //TEST_F(MembusterMemoryTest, Windows) {
 //  RunTest("membuster", 0);
 //}
 
 }  // namespace