Fix stack trace accessor behavior.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 8909e25f638032df8dba94649c659c6c9afc8331..eb9d3116ba532d92d4f7e895f13564929804b2d5 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -2211,6 +2211,17 @@ bool Genesis::InstallSpecialObjects(Handle<Context> native_context) {
         false);
   }
 
+  // Expose the stack trace symbol to native JS.
+  RETURN_ON_EXCEPTION_VALUE(
+      isolate,
+      JSObject::SetOwnPropertyIgnoreAttributes(
+          handle(native_context->builtins(), isolate),
+          factory->InternalizeOneByteString(
+              STATIC_ASCII_VECTOR("stack_trace_symbol")),
+          factory->stack_trace_symbol(),
+          NONE),
+      false);
+
   // Expose the debug global object in global if a name for it is specified.
   if (FLAG_expose_debug_as != NULL && strlen(FLAG_expose_debug_as) != 0) {
     // If loading fails we just bail out without installing the