Refactors event dispatching of NativeViewport into its own interface

mojo/services/window_manager/native_viewport_event_dispatcher_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/services/window_manager/window_manager_internal_service_impl.h"
+#include "mojo/services/window_manager/native_viewport_event_dispatcher_impl.h"
 
 #include "mojo/aura/window_tree_host_mojo.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
 #include "mojo/services/window_manager/window_manager_app.h"
-#include "mojo/services/window_manager/window_manager_delegate.h"
 
 namespace mojo {
 
-WindowManagerInternalServiceImpl::WindowManagerInternalServiceImpl(
+NativeViewportEventDispatcherImpl::NativeViewportEventDispatcherImpl(
     WindowManagerApp* app)
     : app_(app) {
 }
-
-WindowManagerInternalServiceImpl::~WindowManagerInternalServiceImpl() {
+NativeViewportEventDispatcherImpl::~NativeViewportEventDispatcherImpl() {
 }
 
-void WindowManagerInternalServiceImpl::OnViewInputEvent(mojo::EventPtr event) {
+void NativeViewportEventDispatcherImpl::OnEvent(
+    mojo::EventPtr event,
+    const mojo::Callback<void()>& callback) {
   scoped_ptr<ui::Event> ui_event = event.To<scoped_ptr<ui::Event>>();
   if (ui_event)
     app_->host()->SendEventToProcessor(ui_event.get());
-}
-
-void WindowManagerInternalServiceImpl::OnConnectionEstablished() {
-  app_->set_window_manager_client(client());
+  callback.Run();
 }
 
 }  // namespace mojo