Revert of ApplicationImpl cleanup, part 1:

mojo/application/public/cpp/lib/app_lifetime_helper.cc

 // Copyright 2015 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 "mojo/application/public/cpp/app_lifetime_helper.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/application/public/cpp/application_impl.h"
 
@@ skipping 65 matching lines @@
       this, base::MessageLoop::current()->task_runner()));
 }
 
 void AppLifetimeHelper::AddRef() {
   ref_count_++;
 }
 
 void AppLifetimeHelper::Release() {
   if (!--ref_count_) {
     if (app_)
-      app_->Quit();
+      app_->Terminate();
   }
 }
 
-void AppLifetimeHelper::OnQuit() {
+void AppLifetimeHelper::ApplicationTerminated() {
   app_ = nullptr;
 }
 
 }  // namespace mojo