Async/await catch prediction for "the synchronous case"

src/debug/debug.h

Index: src/debug/debug.h
diff --git a/src/debug/debug.h b/src/debug/debug.h
index 63d4e3147f8d0fd5bf975e792d4f04b73664ee00..c4e8c17246903b90b805fab9c5723e270df72e46 100644
--- a/src/debug/debug.h
+++ b/src/debug/debug.h
@@ -413,7 +413,7 @@ class Debug {
   void OnDebugBreak(Handle<Object> break_points_hit, bool auto_continue);
 
   void OnThrow(Handle<Object> exception);
-  void OnPromiseReject(Handle<JSObject> promise, Handle<Object> value);
+  void OnPromiseReject(Handle<Object> promise, Handle<Object> value);
   void OnCompileError(Handle<Script> script);
   void OnBeforeCompile(Handle<Script> script);
   void OnAfterCompile(Handle<Script> script);
@@ -594,9 +594,6 @@ class Debug {
   // Mirror cache handling.
   void ClearMirrorCache();
 
-  MaybeHandle<Object> PromiseHasUserDefinedRejectHandler(
-      Handle<JSObject> promise);
-
   void CallEventCallback(v8::DebugEvent event,
                          Handle<Object> exec_state,
                          Handle<Object> event_data,