Object properties with values of Symbol type should not be expandable.

BUG=376194

Review URL: https://codereview.chromium.org/337353002

git-svn-id: svn://svn.chromium.org/blink/trunk@176326 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js

@@ -222,7 +222,7 @@ WebInspector.RemoteObjectImpl = function(target, objectId, type, subtype, value,
         // handle
         this._objectId = objectId;
         this._description = description;
-        this._hasChildren = true;
+        this._hasChildren = (type !== "symbol");
         this._preview = preview;
     } else {
         // Primitive or null object.