lint failure with latest depot_tools

BUG=
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/15795006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14992 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects.cc

@@ -8540,6 +8540,8 @@ class StringComparator {
       const uint8_t* buffer8_;
       const uint16_t* buffer16_;
     };
+
+   private:
     DISALLOW_IMPLICIT_CONSTRUCTORS(State);
   };