Add OVERRIDE to webkit/.

webkit/plugins/npapi/test/plugin_windowless_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_PLUGIN_EXECUTE_SCRIPT_DELETE_TEST_H_
 #define WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_EXECUTE_SCRIPT_DELETE_TEST_H_
 
 #include "webkit/plugins/npapi/test/plugin_test.h"
 
 namespace NPAPIClient {
 
 // This class contains a list of windowless plugin tests. Please add additional
 // tests to this class.
 class WindowlessPluginTest : public PluginTest {
  public:
   // Constructor.
   WindowlessPluginTest(NPP id, NPNetscapeFuncs *host_functions);
 
   // These tests run in windowless plugin mode.
-  virtual bool IsWindowless() const;
+  virtual bool IsWindowless() const OVERRIDE;
 
   // NPAPI HandleEvent handler
-  virtual int16 HandleEvent(void* event);
+  virtual int16 HandleEvent(void* event) OVERRIDE;
 
  protected:
   NPError ExecuteScript(NPNetscapeFuncs* browser, NPP id,
       const std::string& script, NPVariant* result);
   void ExecuteScriptDeleteInPaint(NPNetscapeFuncs* browser);
   void MultipleInstanceSyncCalls(NPNetscapeFuncs* browser);
   void ConvertPoint(NPNetscapeFuncs* browser);
 };
 
 }  // namespace NPAPIClient
 
 #endif  // WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_EXECUTE_SCRIPT_DELETE_TEST_H_