[Presentation API] Plumbing of |onstatechange| from the Mojo service to the public/platform

content/renderer/presentation/presentation_session_dispatcher.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 "content/renderer/presentation/presentation_session_dispatcher.h"
-
-#include "base/logging.h"
-
-namespace content {
-
-PresentationSessionDispatcher::PresentationSessionDispatcher(
-    presentation::PresentationSessionInfoPtr session_info)
-    : session_info_(session_info.Pass()) {
-}
-
-PresentationSessionDispatcher::~PresentationSessionDispatcher() {
-}
-
-const mojo::String& PresentationSessionDispatcher::GetUrl() const {
-  DCHECK(!session_info_.is_null());
-  return session_info_->url;
-}
-
-const mojo::String& PresentationSessionDispatcher::GetId() const {
-  DCHECK(!session_info_.is_null());
-  return session_info_->id;
-}
-
-}  // namespace content