Use a custom Struct for stack trace storage

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 571cd3ff9b66395a82411de91de0304353b6e16a..3d45c2116c1496663a30943a25e12ebe0fab7ee3 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -917,6 +917,13 @@ Handle<Script> Factory::NewScript(Handle<String> source) {
   return script;
 }
 
+Handle<StackTraceFrame> Factory::NewStackTraceFrame() {
+  Handle<StackTraceFrame> frame =
+      Handle<StackTraceFrame>::cast(NewStruct(STACK_TRACE_FRAME_TYPE));
+  frame->set_flags(0);
+  frame->set_offset(0);
+  return frame;
+}
 
 Handle<Foreign> Factory::NewForeign(Address addr, PretenureFlag pretenure) {
   CALL_HEAP_FUNCTION(isolate(),