Remove mojo/apps/js, it is unused

mojo/apps/js/application_delegate_impl.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/apps/js/application_delegate_impl.h"
-
-#include "gin/array_buffer.h"
-#include "gin/public/isolate_holder.h"
-#include "mojo/apps/js/js_app.h"
-#include "mojo/public/cpp/application/application_impl.h"
-
-namespace mojo {
-namespace apps {
-
-ApplicationDelegateImpl::ApplicationDelegateImpl()
-    : application_impl_(nullptr) {
-}
-
-void ApplicationDelegateImpl::Initialize(ApplicationImpl* app) {
-  application_impl_ = app;
-  gin::IsolateHolder::Initialize(gin::IsolateHolder::kStrictMode,
-                                 gin::ArrayBufferAllocator::SharedInstance());
-}
-
-ApplicationDelegateImpl::~ApplicationDelegateImpl() {
-}
-
-void ApplicationDelegateImpl::StartJSApp(scoped_ptr<JSApp> app_ptr) {
-  JSApp *app = app_ptr.release();
-  app_vector_.push_back(app);
-  // TODO(hansmuller): deal with the Start() return value.
-  app->Start();
-}
-
-void ApplicationDelegateImpl::QuitJSApp(JSApp* app) {
-  AppVector::iterator itr =
-      std::find(app_vector_.begin(), app_vector_.end(), app);
-  if (itr != app_vector_.end())
-    app_vector_.erase(itr);
-  if (app_vector_.empty())
-    base::MessageLoop::current()->QuitNow();
-}
-
-void ApplicationDelegateImpl::ConnectToService(
-    ScopedMessagePipeHandle pipe_handle,
-    const std::string& application_url,
-    const std::string& interface_name) {
-  CHECK(application_impl_);
-  ServiceProvider* service_provider =
-      application_impl_->ConnectToApplication(application_url)
-          ->GetServiceProvider();
-  service_provider->ConnectToService(interface_name, pipe_handle.Pass());
-}
-
-}  // namespace apps
-}  // namespace mojo