Avoid loading the last used browser profile in app_controller_mac when it's not needed.

chrome/browser/ui/startup/startup_browser_creator.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_UI_STARTUP_STARTUP_BROWSER_CREATOR_H_
 #define CHROME_BROWSER_UI_STARTUP_STARTUP_BROWSER_CREATOR_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 152 matching lines @@
 
   static bool in_synchronous_profile_launch_;
 
   DISALLOW_COPY_AND_ASSIGN(StartupBrowserCreator);
 };
 
 // Returns true if |profile| has exited uncleanly and has not been launched
 // after the unclean exit.
 bool HasPendingUncleanExit(Profile* profile);
 
+// Returns the path that contains the profile that should be loaded on process
+// startup.
+base::FilePath GetStartupProfilePath(const base::FilePath& user_data_dir,
+                                     const CommandLine& command_line);
+
 #endif  // CHROME_BROWSER_UI_STARTUP_STARTUP_BROWSER_CREATOR_H_