[TypeFeedbackVector/Crankshaft] Fix private symbol feedback.

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index b13118d526ce27ba6aea3e32d2b2a707d625e4fa..ed0749d77f75fc0ddbd793f5a460fa6c23a2ffec 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -6407,6 +6407,10 @@ bool HOptimizedGraphBuilder::PropertyAccessInfo::LoadFieldMaps(
 
 bool HOptimizedGraphBuilder::PropertyAccessInfo::LookupInPrototypes() {
   Handle<Map> map = this->map();
+  if (name_->IsPrivate()) {
+    NotFound();
+    return !map->has_hidden_prototype();
+  }
 
   while (map->prototype()->IsJSObject()) {
     holder_ = handle(JSObject::cast(map->prototype()));