Trigger exception debug event for promises at the throw site.

src/runtime.h

Index: src/runtime.h
diff --git a/src/runtime.h b/src/runtime.h
index eb28f837015ecd1843cd345fcb8f661008d8d36e..6a25d3432064be4dd08d4b331668cdd669b7b970 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -75,7 +75,8 @@ namespace internal {
   F(SetInlineBuiltinFlag, 1, 1) \
   F(StoreArrayLiteralElement, 5, 1) \
   F(DebugPrepareStepInIfStepping, 1, 1) \
-  F(DebugPendingExceptionInPromise, 2, 1) \
+  F(DebugPromiseHandlePrologue, 1, 1) \
+  F(DebugPromiseHandleEpilogue, 0, 1) \
   F(FlattenString, 1, 1) \
   F(LoadMutableDouble, 2, 1) \
   F(TryMigrateInstance, 1, 1) \