Simplify the ApplicationLoader interface in preparation for changes.

shell/android/android_handler_loader.cc

 // Copyright 2014 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 "shell/android/android_handler_loader.h"
 
 namespace mojo {
 namespace shell {
 
 AndroidHandlerLoader::AndroidHandlerLoader() {
 }
 
 AndroidHandlerLoader::~AndroidHandlerLoader() {
 }
 
 void AndroidHandlerLoader::Load(
-    ApplicationManager* manager,
     const GURL& url,
-    InterfaceRequest<Application> application_request,
-    LoadCallback callback) {
+    InterfaceRequest<Application> application_request) {
   DCHECK(application_request.is_pending());
   application_.reset(
       new ApplicationImpl(&android_handler_, application_request.Pass()));
 }
 
 void AndroidHandlerLoader::OnApplicationError(ApplicationManager* manager,
                                               const GURL& url) {
 }
 
 }  // namespace shell
 }  // namespace mojo