Move PathExists to base namespace.

chrome/installer/util/master_preferences.cc

 // Copyright (c) 2012 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/installer/util/master_preferences.h"
 
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/lazy_instance.h"
@@ skipping 83 matching lines @@
     : distribution_(NULL),
       preferences_read_from_file_(false),
       chrome_(true),
       chrome_app_launcher_(false),
       chrome_frame_(false),
       multi_install_(false) {
   std::string json_data;
   // Failure to read the file is ignored as |json_data| will be the empty string
   // and the remainder of this MasterPreferences object should still be
   // initialized as best as possible.
-  if (file_util::PathExists(prefs_path) &&
+  if (base::PathExists(prefs_path) &&
       !file_util::ReadFileToString(prefs_path, &json_data)) {
     LOG(ERROR) << "Failed to read preferences from " << prefs_path.value();
   }
   if (InitializeFromString(json_data))
     preferences_read_from_file_ = true;
 }
 
 MasterPreferences::MasterPreferences(const std::string& prefs)
     : distribution_(NULL),
       preferences_read_from_file_(false),
@@ skipping 202 matching lines @@
   master_dictionary_->GetString(prefs::kVariationsSeed, &variations_seed);
   return variations_seed;
 }
 
 // static
 const MasterPreferences& MasterPreferences::ForCurrentProcess() {
   return g_master_preferences.Get();
 }
 
 }  // namespace installer