Add FilePath setter/getter to pref service....

chrome/test/reliability/page_load_test.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.
 //
 // This file provides reliablity test which runs under UI test framework. The
 // test is intended to run within QEMU environment.
 //
 // Usage 1: reliability_test
 // Upon invocation, it visits a hard coded list of URLs. This is mainly used
 // by buildbot, to verify reliability_test itself runs ok.
@@ skipping 461 matching lines @@
     }
 
     if (metrics)
       metrics->crash_dump_count = num_dumps;
   }
 
   // Get a PrefService whose contents correspond to the Local State file
   // that was saved by the app as it closed.  The caller takes ownership of the
   // returned PrefService object.
   PrefService* GetLocalState() {
-    std::wstring local_state_path = user_data_dir();
-    file_util::AppendToPath(&local_state_path, chrome::kLocalStateFilename);
+    FilePath local_state_path = FilePath::FromWStringHack(user_data_dir())
+        .Append(chrome::kLocalStateFilename);
 
     PrefService* local_state(new PrefService(local_state_path));
     return local_state;
   }
 
   void GetStabilityMetrics(NavigationMetrics* metrics) {
     if (!metrics)
       return;
     scoped_ptr<PrefService> local_state(GetLocalState());
     if (!local_state.get())
@@ skipping 140 matching lines @@
         if (v8_command_line.HasSwitch(kV8LogFileSwitch)) {
           v8_log_path = v8_command_line.GetSwitchValue(kV8LogFileSwitch);
           if (!file_util::AbsolutePath(&v8_log_path)) {
             v8_log_path.clear();
           }
         }
       }
     }
   }
 }