Fix the new First Run sentinel file path determination.

chrome/browser/first_run/first_run.h

 // 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.
 
 #ifndef CHROME_BROWSER_FIRST_RUN_FIRST_RUN_H_
 #define CHROME_BROWSER_FIRST_RUN_FIRST_RUN_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 83 matching lines @@
 // the process singleton has been grabbed by the current process
 // (http://crbug.com/264694).
 void CreateSentinelIfNeeded();
 
 // Get RLZ ping delay pref name.
 std::string GetPingDelayPrefName();
 
 // Register user preferences used by the MasterPrefs structure.
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
-// Removes the sentinel file created in ConfigDone(). Returns false if the
-// sentinel file could not be removed.
+// Remove the first run sentinel file; returns false on failure.
 bool RemoveSentinel();
 
 // Sets the kShowFirstRunBubbleOption local state pref so that the browser
 // shows the bubble once the main message loop gets going (or refrains from
 // showing the bubble, if |show_bubble| is not FIRST_RUN_BUBBLE_SHOW).
 // Once FIRST_RUN_BUBBLE_SUPPRESS is set, no other value can be set.
 // Returns false if the pref service could not be retrieved.
 bool SetShowFirstRunBubblePref(FirstRunBubbleOptions show_bubble_option);
 
 // Sets a flag that will cause ShouldShowWelcomePage to return true
@@ skipping 57 matching lines @@
 //
 // See chrome/installer/util/master_preferences.h for a description of
 // 'master_preferences' file.
 ProcessMasterPreferencesResult ProcessMasterPreferences(
     const base::FilePath& user_data_dir,
     MasterPrefs* out_prefs);
 
 }  // namespace first_run
 
 #endif  // CHROME_BROWSER_FIRST_RUN_FIRST_RUN_H_