Add OVERRIDE to webkit/.

webkit/plugins/npapi/test/plugin_delete_plugin_in_deallocate_test.h

 // 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.
 #ifndef WEBKIT_PLUGINS_NPAPI_TEST_DELETE_PLUGIN_IN_DEALLOCATE_TEST_H_
 #define WEBKIT_PLUGINS_NPAPI_TEST_DELETE_PLUGIN_IN_DEALLOCATE_TEST_H_
 
+#include "base/compiler_specific.h"
 #include "webkit/plugins/npapi/test/plugin_test.h"
 
 namespace NPAPIClient {
 
 // This test verifies that if a plugin scripts the page from within an
 // NPObject's deallocation, and the page tears down the plugin, then that
 // object doesn't end up being double-freed.
 
 class DeletePluginInDeallocateTest : public PluginTest {
  public:
   // Constructor.
   DeletePluginInDeallocateTest(NPP id, NPNetscapeFuncs* host_functions);
 
   // NPAPI handlers.
-  virtual NPError SetWindow(NPWindow* pNPWindow);
-  virtual NPError Destroy();
+  virtual NPError SetWindow(NPWindow* pNPWindow) OVERRIDE;
+  virtual NPError Destroy() OVERRIDE;
 
   NPObject* npobject_;
   bool test_started_;
 };
 
 }  // namespace NPAPIClient
 
 #endif  // WEBKIT_PLUGINS_NPAPI_TEST_DELETE_PLUGIN_IN_DEALLOCATE_TEST_H_