Disable NPAPIIncognitoTester.PrivateEnabled test because it's flaky.

TBR=jam
Review URL: http://codereview.chromium.org/149289

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@20098 0039d316-1c4b-4281-b951-d872f2087c98

webkit/glue/plugins/test/plugin_client.cc

@@ -149,8 +149,11 @@ NPError NPP_New(NPMIMEType pluginType, NPP instance, uint16 mode,
     new_test = new NPAPIClient::ExecuteJavascriptPopupWindowTargetPluginTest(
         instance, NPAPIClient::PluginClient::HostFunctions());
   } else if (test_name == "private") {
+// http://code.google.com/p/chromium/issues/detail?id=16149
+#if 0
     new_test = new NPAPIClient::PrivateTest(instance,
       NPAPIClient::PluginClient::HostFunctions());
+#endif
 #if defined(OS_WIN)
   // TODO(port): plugin_windowed_test.*.
   } else if (test_name == "hidden_plugin" ||