[V8] Use Function.name in Error.stack

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index d4b00fb182b1b9ad4afd0e3bb80b8ec224457ece..817e908c8e202cfebabd2e414532029a9b117199 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7540,6 +7540,10 @@ class JSFunction: public JSObject {
   // Used for flags such as --hydrogen-filter.
   bool PassesFilter(const char* raw_filter);
 
+  // The function's name if it is configured, otherwise shared function info
+  // debug name.
+  String* DebugName();
+
   // Layout descriptors. The last property (from kNonWeakFieldsEndOffset to
   // kSize) is weak and has special handling during garbage collection.
   static const int kCodeEntryOffset = JSObject::kHeaderSize;