Introduce LaunchParams struct for opening chrome apps.

chrome/browser/ui/startup/startup_browser_creator_impl.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/browser/ui/startup/startup_browser_creator_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
@@ skipping 408 matching lines @@
 
     // TODO(skerner): Could pass in |extension| and |launch_container|,
     // and avoid calling GetAppLaunchContainer() both here and in
     // OpenApplicationTab().
 
     if (launch_container == extension_misc::LAUNCH_TAB)
       return false;
 
     RecordCmdLineAppHistogram();
 
+    application_launch::LaunchParams params(profile, extension,
+                                            launch_container, NEW_WINDOW);
+    params.command_line = &command_line_;
     WebContents* tab_in_app_window = application_launch::OpenApplication(
-        profile, extension, launch_container, GURL(), NEW_WINDOW,
-        &command_line_);
+        params);
 
     if (out_app_contents)
       *out_app_contents = tab_in_app_window;
 
     // Platform apps fire off a launch event which may or may not open a window.
     return (tab_in_app_window != NULL || extension->is_platform_app());
   }
 
   if (url_string.empty())
     return false;
@@ skipping 418 matching lines @@
         // New:
         prefs->GetString(prefs::kHomePage),
         prefs->GetBoolean(prefs::kHomePageIsNewTabPage),
         prefs->GetBoolean(prefs::kShowHomeButton),
         // Backup:
         backup_homepage,
         backup_homepage_is_ntp,
         backup_show_home_button));
   }
 }