Plumbing from WebPresentationClient to the Presentation Mojo service for

content/renderer/presentation/presentation_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_dispatcher.h"
+
+#include "content/common/presentation/presentation_service.mojom.h"
+#include "content/public/common/service_registry.h"
+#include "content/public/renderer/render_frame.h"
+#include "third_party/WebKit/public/platform/WebPresentationController.h"
+
+namespace content {
+
+PresentationDispatcher::PresentationDispatcher(RenderFrame* render_frame)
+    : RenderFrameObserver(render_frame) {}
+
+PresentationDispatcher::~PresentationDispatcher() {}
+
+void PresentationDispatcher::setController(
+    blink::WebPresentationController* controller) {
+  controller_ = controller;
+}
+
+void PresentationDispatcher::updateAvailableChangeWatched(bool watched) {
+  ConnectToPresentationServiceIfNeeded();
+  presentation_service_->UpdateAvailableChangeWatched(watched);
+}
+
+void PresentationDispatcher::DeviceAvailabilityChanged(bool available) {
+  if (controller_)
+    controller_->didChangeAvailability(available);
+}
+
+void PresentationDispatcher::ConnectToPresentationServiceIfNeeded() {
+  if (presentation_service_.get())
+    return;
+
+  render_frame()->GetServiceRegistry()->ConnectToRemoteService(
+      &presentation_service_);
+  presentation::PresentationServiceClientPtr clientPointer;
+  mojo::BindToProxy(this, &clientPointer);
+  presentation_service_->SetClient(clientPointer.Pass());
+}
+
+}  // namespace content