[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 76b64f6bb532ac581034b760c37390aa82751909..6dd451e1872d8415c83a0c9bbde783168f773f0d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7605,6 +7605,10 @@ 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;