[Presentation API] (MR side) 1-UA: notify receiver page when receiver connection becomes available

chrome/browser/media/router/presentation_service_delegate_impl.cc

Index: chrome/browser/media/router/presentation_service_delegate_impl.cc
diff --git a/chrome/browser/media/router/presentation_service_delegate_impl.cc b/chrome/browser/media/router/presentation_service_delegate_impl.cc
index 581357dced0c7900c4062f72870482a748830424..55565fbf921135bef91be8f2036fc12f0477582b 100644
--- a/chrome/browser/media/router/presentation_service_delegate_impl.cc
+++ b/chrome/browser/media/router/presentation_service_delegate_impl.cc
@@ -21,6 +21,8 @@
 #include "chrome/browser/media/router/media_router_factory.h"
 #include "chrome/browser/media/router/media_sink.h"
 #include "chrome/browser/media/router/media_source_helper.h"
+#include "chrome/browser/media/router/offscreen_presentation_manager.h"
+#include "chrome/browser/media/router/offscreen_presentation_manager_factory.h"
 #include "chrome/browser/media/router/presentation_media_sinks_observer.h"
 #include "chrome/browser/media/router/route_message.h"
 #include "chrome/browser/media/router/route_message_observer.h"
@@ -666,9 +668,13 @@ PresentationServiceDelegateImpl::PresentationServiceDelegateImpl(
       router_(MediaRouterFactory::GetApiForBrowserContext(
           web_contents_->GetBrowserContext())),
       frame_manager_(new PresentationFrameManager(web_contents, router_)),
+      m_offscreenPresentationManager(
+          OffscreenPresentationManagerFactory::GetOrCreateForBrowserContext(
+              web_contents_->GetBrowserContext())),
       weak_factory_(this) {
   DCHECK(web_contents_);
   DCHECK(router_);
+  DCHECK(m_offscreenPresentationManager);
 }
 
 PresentationServiceDelegateImpl::~PresentationServiceDelegateImpl() {
@@ -966,4 +972,18 @@ bool PresentationServiceDelegateImpl::HasScreenAvailabilityListenerForTest(
       render_frame_host_id, source_id);
 }
 
+void PresentationServiceDelegateImpl::RegisterOffscreenPresentationController(
+    const std::string& presentation_id,
+    content::OffscreenPresentationClient* client) {
+  m_offscreenPresentationManager->RegisterOffscreenPresentationController(
+      presentation_id, client);
+}
+
+void PresentationServiceDelegateImpl::UnregisterOffscreenPresentationController(
+    const std::string& presentation_id,
+    content::OffscreenPresentationClient* client) {
+  m_offscreenPresentationManager->UnregisterOffscreenPresentationController(
+      presentation_id, client);
+}
+
 }  // namespace media_router