[Presentation API] fire onconnectionavailable and onconnect event asynchronously

third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp

Index: third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
diff --git a/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp b/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
index e7d005333b686f332fb64a173e789ece4d5ca05e..da9c1ca45619f6a3701b3c827e565a967df21928 100644
--- a/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
+++ b/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
@@ -9,6 +9,7 @@
 #include "core/dom/DOMArrayBufferView.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/dom/ExecutionContextTask.h"
 #include "core/events/Event.h"
 #include "core/events/MessageEvent.h"
 #include "core/fileapi/FileReaderLoader.h"
@@ -191,9 +192,6 @@ PresentationConnection* PresentationConnection::take(
   PresentationConnection* connection = new PresentationConnection(
       controller->frame(), client->getId(), client->getUrl());
   controller->registerConnection(connection);
-  request->dispatchEvent(PresentationConnectionAvailableEvent::create(
-      EventTypeNames::connectionavailable, connection));
-
   return connection;
 }
 
@@ -415,7 +413,10 @@ void PresentationConnection::didChangeState(
       NOTREACHED();
       return;
     case WebPresentationConnectionState::Connected:
-      dispatchEvent(Event::create(EventTypeNames::connect));
+      getExecutionContext()->postTask(
+          BLINK_FROM_HERE,
+          createSameThreadTask(&PresentationConnection::dispatchConnectEvent,
+                               wrapPersistent(this)));
       return;
     case WebPresentationConnectionState::Terminated:
       dispatchEvent(Event::create(EventTypeNames::terminate));
@@ -464,6 +465,10 @@ void PresentationConnection::didFailLoadingBlob(
   handleMessageQueue();
 }
 
+void PresentationConnection::dispatchConnectEvent() {
+  dispatchEvent(Event::create(EventTypeNames::connect));
+}
+
 void PresentationConnection::tearDown() {
   // Cancel current Blob loading if any.
   if (m_blobLoader) {