[Extensions] Make port creation synchronous in unload handlers

third_party/WebKit/Source/web/WebDocument.cpp

Index: third_party/WebKit/Source/web/WebDocument.cpp
diff --git a/third_party/WebKit/Source/web/WebDocument.cpp b/third_party/WebKit/Source/web/WebDocument.cpp
index c3bc1c988abec5e05e66686b501b84cb5038aa36..ca949a9df29de4a830a4ad82b4076b0b9e8a27f8 100644
--- a/third_party/WebKit/Source/web/WebDocument.cpp
+++ b/third_party/WebKit/Source/web/WebDocument.cpp
@@ -206,6 +206,14 @@ void WebDocument::watchCSSSelectors(const WebVector<WebString>& webSelectors) {
   CSSSelectorWatch::from(*document).watchCSSSelectors(selectors);
 }
 
+bool WebDocument::unloadStartedDoNotUse() const {
+  return constUnwrap<Document>()->unloadStarted();
+}
+
+bool WebDocument::processingBeforeUnloadDoNotUse() const {
+  return constUnwrap<Document>()->processingBeforeUnload();
+}
+
 WebReferrerPolicy WebDocument::referrerPolicy() const {
   return static_cast<WebReferrerPolicy>(
       constUnwrap<Document>()->getReferrerPolicy());