Default Implementation of toString for NPObject shouldn't return NPClass & NPObject address as String
https://bugs.webkit.org/show_bug.cgi?id=114450

Patch by Arunprasad Rajkumar <arunprasadr@nds.com> on 2013-04-11
Reviewed by Anders Carlsson.

* bridge/c/c_instance.cpp:
(JSC::Bindings::CInstance::stringValue):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148224 268f45cc-cd09-0410-ab3c-d52691b4dbfc