Update platform classes to use OVERRIDE / FINAL when needed

Source/platform/plugins/PluginListBuilder.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #ifndef PluginListBuilder_h
 #define PluginListBuilder_h
 
 #include "platform/plugins/PluginData.h"
 #include "public/platform/WebPluginListBuilder.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
-class PluginListBuilder : public blink::WebPluginListBuilder {
+class PluginListBuilder FINAL : public blink::WebPluginListBuilder {
 public:
     PluginListBuilder(Vector<WebCore::PluginInfo>* results) : m_results(results) { }
 
     // WebPluginListBuilder methods:
-    virtual void addPlugin(const blink::WebString& name, const blink::WebString& description, const blink::WebString& fileName);
-    virtual void addMediaTypeToLastPlugin(const blink::WebString& name, const blink::WebString& description);
-    virtual void addFileExtensionToLastMediaType(const blink::WebString& extension);
+    virtual void addPlugin(const blink::WebString& name, const blink::WebString& description, const blink::WebString& fileName) OVERRIDE;
+    virtual void addMediaTypeToLastPlugin(const blink::WebString& name, const blink::WebString& description) OVERRIDE;
+    virtual void addFileExtensionToLastMediaType(const blink::WebString& extension) OVERRIDE;
 
 private:
     Vector<PluginInfo>* m_results;
 };
 
 } // namespace WebCore
 
 #endif