[Presentation API] fire onconnectionavailable and onconnect event asynchronously

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

Index: third_party/WebKit/Source/modules/presentation/PresentationConnection.h
diff --git a/third_party/WebKit/Source/modules/presentation/PresentationConnection.h b/third_party/WebKit/Source/modules/presentation/PresentationConnection.h
index 323c6a38f42c7c8e9b28cb3241ff5f630d0f2e07..c6fa64bc397df62d765ca7c2a25fa6f1f1640e2c 100644
--- a/third_party/WebKit/Source/modules/presentation/PresentationConnection.h
+++ b/third_party/WebKit/Source/modules/presentation/PresentationConnection.h
@@ -114,6 +114,10 @@ class PresentationConnection final : public EventTargetWithInlineData,
   void didFinishLoadingBlob(DOMArrayBuffer*);
   void didFailLoadingBlob(FileError::ErrorCode);
 
+  // Internal helper function to dispatch state change events asynchronously.
+  void dispatchStateChangeEvent(Event*);
+  static void dispatchEventAsync(EventTarget*, Event*);
+
   // Cancel loads and pending messages when the connection is closed.
   void tearDown();