Refactors event dispatching of NativeViewport into its own interface

mojo/services/window_manager/window_manager_internal_service_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/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(
-    WindowManagerApp* app)
-    : app_(app) {
-}
-
-WindowManagerInternalServiceImpl::~WindowManagerInternalServiceImpl() {
-}
-
-void WindowManagerInternalServiceImpl::OnViewInputEvent(mojo::EventPtr event) {
-  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());
-}
-
-}  // namespace mojo