Changes to allow testing interface for new NaCl Proxy

ppapi/proxy/ppb_testing_proxy.cc

Index: ppapi/proxy/ppb_testing_proxy.cc
===================================================================
--- ppapi/proxy/ppb_testing_proxy.cc	(revision 157652)
+++ ppapi/proxy/ppb_testing_proxy.cc	(working copy)
@@ -93,10 +93,16 @@
 }
 
 PP_Var GetDocumentURL(PP_Instance instance, PP_URLComponents_Dev* components) {
+#if !defined(OS_NACL)
   EnterInstance enter(instance);
   if (enter.failed())
     return PP_MakeUndefined();
   return enter.functions()->GetDocumentURL(instance, components);
+#else
+  // TODO(nfullagar): Implement something better for the new NaCl IPC plugin.
+  // For now, this will at least allow some of the PPAPI tests to work.
+  return PP_MakeUndefined();
+#endif
 }
 
 // TODO(dmichael): Ideally we could get a way to check the number of vars in the