Introduce LaunchParams struct for opening chrome apps.

chrome/browser/autocomplete/extension_app_provider.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/autocomplete/extension_app_provider.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/string16.h"
@@ skipping 42 matching lines @@
 
   AppLauncherHandler::RecordAppLaunchType(
       extension_misc::APP_LAUNCH_OMNIBOX_APP);
 
   // Look at the preferences to find the right launch container.  If no
   // preference is set, launch as a regular tab.
   extension_misc::LaunchContainer launch_container =
       service->extension_prefs()->GetLaunchContainer(
           extension, extensions::ExtensionPrefs::LAUNCH_REGULAR);
 
-  application_launch::OpenApplication(profile, extension, launch_container,
-                                      GURL(), disposition, NULL);
+  application_launch::OpenApplication(application_launch::LaunchParams(
+          profile, extension, launch_container, disposition));
 }
 
 void ExtensionAppProvider::AddExtensionAppForTesting(
     const ExtensionApp& extension_app) {
   extension_apps_.push_back(extension_app);
 }
 
 AutocompleteMatch ExtensionAppProvider::CreateAutocompleteMatch(
     const AutocompleteInput& input,
     const ExtensionApp& app,
@@ skipping 140 matching lines @@
     history::URLRow info;
     url_db->GetRowForURL(url, &info);
     type_count_boost =
         400 * (1.0 - (std::pow(static_cast<double>(2), -info.typed_count())));
   }
   int relevance = 575 + static_cast<int>(type_count_boost) +
                         static_cast<int>(fraction_boost);
   DCHECK_LE(relevance, kMaxRelevance);
   return relevance;
 }