Use FINAL macro for classes whose virtual destructor was removed

Source/platform/PODArena.h

Index: Source/platform/PODArena.h
diff --git a/Source/platform/PODArena.h b/Source/platform/PODArena.h
index da9d4460fd9977d74b57d828b802bcb4c2db0c47..ad6852e5c617790456ef46bdf047a2ddbeeaad64 100644
--- a/Source/platform/PODArena.h
+++ b/Source/platform/PODArena.h
@@ -42,7 +42,7 @@ namespace WebCore {
 // the objects allocated in this arena are called, but _not_ their
 // destructors.
 
-class PODArena : public RefCounted<PODArena> {
+class PODArena FINAL : public RefCounted<PODArena> {
 public:
     // The arena is configured with an allocator, which is responsible
     // for allocating and freeing chunks of memory at a time.
@@ -146,7 +146,7 @@ protected:
     }
 
     // Manages a chunk of memory and individual allocations out of it.
-    class Chunk {
+    class Chunk FINAL {
         WTF_MAKE_NONCOPYABLE(Chunk);
     public:
         // Allocates a block of memory of the given size from the passed