Perform HasFastProperties check on prototypes when computing call targets in Crankshaft, part 2.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 009547c79fc401b94d6fbd8aa627067b6c04d827..2ba79b9bf5142e270acb0470ee5ea9b7f6d355fe 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5637,6 +5637,7 @@ static void LookupInPrototypes(Handle<Map> map,
                                LookupResult* lookup) {
   while (map->prototype()->IsJSObject()) {
     Handle<JSObject> holder(JSObject::cast(map->prototype()));
+    if (!holder->HasFastProperties()) break;
     map = Handle<Map>(holder->map());
     map->LookupDescriptor(*holder, *name, lookup);
     if (lookup->IsFound()) return;