[inspector] store v8:StackTrace as FixedArray

src/messages.cc

Index: src/messages.cc
diff --git a/src/messages.cc b/src/messages.cc
index e61ce9079132c7c726778202292c4116a90b8206..1d8dd1597170d96fd82a0a791823da1c76028043 100644
--- a/src/messages.cc
+++ b/src/messages.cc
@@ -51,7 +51,7 @@ void MessageHandler::DefaultMessageReport(Isolate* isolate,
 Handle<JSMessageObject> MessageHandler::MakeMessageObject(
     Isolate* isolate, MessageTemplate::Template message,
     const MessageLocation* location, Handle<Object> argument,
-    Handle<JSArray> stack_frames) {
+    Handle<FixedArray> stack_frames) {
   Factory* factory = isolate->factory();
 
   int start = -1;