Mark await expressions as caught or uncaught

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index 6580eecad7ba52605b911767070f9e54fa70c770..8d4e531f23f30c048e8a59c9f3f03f735aa104ab 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -674,6 +674,7 @@ class Isolate {
   void PushPromise(Handle<JSObject> promise);
   void PopPromise();
   Handle<Object> GetPromiseOnStackOnThrow();
+  bool PromiseHasUserDefinedRejectHandler(Handle<JSObject> promise);
 
   class ExceptionScope {
    public:
@@ -751,7 +752,9 @@ class Isolate {
     NOT_CAUGHT,
     CAUGHT_BY_JAVASCRIPT,
     CAUGHT_BY_EXTERNAL,
-    CAUGHT_BY_DESUGARING
+    CAUGHT_BY_DESUGARING,
+    CAUGHT_BY_PROMISE,
+    CAUGHT_BY_ASYNC_AWAIT
   };
   CatchType PredictExceptionCatcher();