Update rendering classes to use OVERRIDE / FINAL when needed

Source/core/rendering/TrailingFloatsRootInlineBox.h

 /*
  * Copyright (C) 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 21 matching lines @@
 
 class TrailingFloatsRootInlineBox FINAL : public RootInlineBox {
 public:
     TrailingFloatsRootInlineBox(RenderBlockFlow* block)
         : RootInlineBox(block)
     {
         setHasVirtualLogicalHeight();
     }
 
 private:
-    virtual float virtualLogicalHeight() const { return 0; }
+    virtual float virtualLogicalHeight() const OVERRIDE { return 0; }
 };
 
 } // namespace WebCore
 
 #endif // TrailingFloatsRootInlineBox_h