Add OVERRIDE to webkit/.

webkit/plugins/npapi/test/plugin_arguments_test.h

-// 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.
 
 #ifndef WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_ARGUMENTS_TEST_H_
 #define WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_ARGUMENTS_TEST_H_
 
+#include "base/compiler_specific.h"
 #include "webkit/plugins/npapi/test/plugin_test.h"
 
 namespace NPAPIClient {
 
 // The PluginArgumentsTest test that we properly receive arguments
 // intended for the plugin.
 //
 // This is basically overkill for testing that the arguments passed
 // to the plugin match what we expect.
 //
 // We expect to find the following arguments:
 // mode:  should be the string either "NP_EMBED" or "NP_FULL",
 //        depending on the mode passed in.
 // count: the count of "val" arguments.  If the value is
 //        2, then we'll find arguments "val1" and "val2".  If
 //        the value is 0, then there will be no "val" arguments.
 // size:  each val string will be this size * the value's
 //        index.  E.g if size is "10", val1 will be 10bytes,
 //        and val2 will be 20bytes.
 //
 class PluginArgumentsTest : public PluginTest {
  public:
   // Constructor.
   PluginArgumentsTest(NPP id, NPNetscapeFuncs *host_functions);
 
   // Initialize this PluginTest based on the arguments from NPP_New.
   virtual NPError  New(uint16 mode, int16 argc, const char* argn[],
-                       const char* argv[], NPSavedData* saved);
+                       const char* argv[], NPSavedData* saved) OVERRIDE;
 
   // NPAPI SetWindow handler.
-  virtual NPError SetWindow(NPWindow* pNPWindow);
+  virtual NPError SetWindow(NPWindow* pNPWindow) OVERRIDE;
 };
 
 }  // namespace NPAPIClient
 
 #endif  // WEBKIT_PLUGINS_NPAPI_TEST_PLUGIN_ARGUMENTS_TEST_H_