When clearing plugin data at shutdown, wait for it to finish.

webkit/plugins/npapi/test/plugin_client.cc

Index: webkit/plugins/npapi/test/plugin_client.cc
diff --git a/webkit/plugins/npapi/test/plugin_client.cc b/webkit/plugins/npapi/test/plugin_client.cc
index 0b28250a39a64068e77a0035a13772b352bb8609..527485df0bce6713888d7cdae3ae66494719e670 100644
--- a/webkit/plugins/npapi/test/plugin_client.cc
+++ b/webkit/plugins/npapi/test/plugin_client.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -35,6 +35,7 @@ NPError PluginClient::GetEntryPoints(NPPluginFuncs* pFuncs) {
   pFuncs->setvalue      = NPP_SetValue;
   pFuncs->javaClass     = NULL;
   pFuncs->urlredirectnotify = NPP_URLRedirectNotify;
+  pFuncs->clearsitedata = NPP_ClearSiteData;
 
   return NPERR_NO_ERROR;
 }
@@ -237,4 +238,11 @@ void NPP_URLRedirectNotify(NPP instance, const char* url, int32_t status,
     plugin->URLRedirectNotify(url, status, notify_data);
   }
 }
+
+NPError NPP_ClearSiteData(const char* site,
+                          uint64 flags,
+                          uint64 max_age) {
+  LOG(INFO) << "NPP_ClearSiteData called";
+  return NPERR_NO_ERROR;
+}
 } // extern "C"