[Presentation API] 1-UA presentation support + presenter APIs.

content/browser/presentation/presentation_service_impl.cc

Index: content/browser/presentation/presentation_service_impl.cc
diff --git a/content/browser/presentation/presentation_service_impl.cc b/content/browser/presentation/presentation_service_impl.cc
index a9a73dd0304d38aaf74b270b1646c82d89a4db1c..cc639849786e952c90d91e5e2eba4bd679d188d5 100644
--- a/content/browser/presentation/presentation_service_impl.cc
+++ b/content/browser/presentation/presentation_service_impl.cc
@@ -187,7 +187,7 @@ void PresentationServiceImpl::ListenForScreenAvailability(
   }
 
   const std::string& availability_url = url.get();
-  if (screen_availability_listeners_.count(availability_url))
+  if (ContainsKey(screen_availability_listeners_, availability_url))
     return;
 
   std::unique_ptr<ScreenAvailabilityListenerImpl> listener(
@@ -460,6 +460,31 @@ void PresentationServiceImpl::ListenForSessionMessages(
                  weak_factory_.GetWeakPtr(), session_info));
 }
 
+void PresentationServiceImpl::GetReceiverConnections(
+    const PresentationConnectionListMojoCallback& callback) {
+  DCHECK(!callback.is_null());
+  DVLOG(2) << "GetPresentationReceiverSession";
+  if (!delegate_) {
+    callback.Run(mojo::Array<blink::mojom::PresentationSessionInfoPtr>());
+    return;
+  }
+
+  std::vector<PresentationSessionInfo> connections =
+      delegate_->GetReceiverConnections(
+          render_process_id_, render_frame_id_,
+          base::Bind(&PresentationServiceImpl::OnReceiverConnectionAvailable,
+                     weak_factory_.GetWeakPtr()));
+  callback.Run(
+      mojo::Array<blink::mojom::PresentationSessionInfoPtr>::From(connections));
+}
+
+void PresentationServiceImpl::OnReceiverConnectionAvailable(
+    const content::PresentationSessionInfo& connection) {
+  DCHECK(client_);
+  client_->OnReceiverConnectionAvailable(
+      blink::mojom::PresentationSessionInfo::From(connection));
+}
+
 void PresentationServiceImpl::OnSessionMessages(
     const PresentationSessionInfo& session,
     const ScopedVector<PresentationSessionMessage>& messages,