Get rid of KeepAlive. Quit shell when all urls run directly by Context are closed.

mojo/application_manager/application_manager.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 "mojo/application_manager/application_manager.h"
 
 #include <stdio.h>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
@@ skipping 130 matching lines @@
 bool ApplicationManager::TestAPI::HasCreatedInstance() {
   return has_created_instance;
 }
 
 bool ApplicationManager::TestAPI::HasFactoryForURL(const GURL& url) const {
   return manager_->url_to_shell_impl_.find(url) !=
          manager_->url_to_shell_impl_.end();
 }
 
 ApplicationManager::ApplicationManager()
-    : interceptor_(NULL), weak_ptr_factory_(this) {
+    : delegate_(NULL),
+      interceptor_(NULL),
+      weak_ptr_factory_(this) {
 }
 
 ApplicationManager::~ApplicationManager() {
   STLDeleteValues(&url_to_content_handler_);
   TerminateShellConnections();
   STLDeleteValues(&url_to_loader_);
   STLDeleteValues(&scheme_to_loader_);
 }
 
 void ApplicationManager::TerminateShellConnections() {
@@ skipping 116 matching lines @@
 void ApplicationManager::OnShellImplError(ShellImpl* shell_impl) {
   // Called from ~ShellImpl, so we do not need to call Destroy here.
   const GURL url = shell_impl->url();
   URLToShellImplMap::iterator it = url_to_shell_impl_.find(url);
   DCHECK(it != url_to_shell_impl_.end());
   delete it->second;
   url_to_shell_impl_.erase(it);
   ApplicationLoader* loader = GetLoaderForURL(url);
   if (loader)
     loader->OnServiceError(this, url);
+  if (delegate_)
+    delegate_->OnServiceError(url);
 }
 
 ScopedMessagePipeHandle ApplicationManager::ConnectToServiceByName(
     const GURL& application_url,
     const std::string& interface_name) {
   StubServiceProvider* stub_sp = new StubServiceProvider;
   ServiceProviderPtr spp;
   BindToProxy(stub_sp, &spp);
   ConnectToApplication(application_url, GURL(), spp.Pass());
   MessagePipe pipe;
   stub_sp->GetRemoteServiceProvider()->ConnectToService(interface_name,
                                                         pipe.handle1.Pass());
   return pipe.handle0.Pass();
 }
 }  // namespace mojo