Update WTF classes to use OVERRIDE / FINAL when needed

Source/wtf/Int8Array.h

Index: Source/wtf/Int8Array.h
diff --git a/Source/wtf/Int8Array.h b/Source/wtf/Int8Array.h
index c4aaa2100316440265d3cdc067bfd0a8beafe613..f8a77e70d238bbc5ec76374c4fb8149c18e2722e 100644
--- a/Source/wtf/Int8Array.h
+++ b/Source/wtf/Int8Array.h
@@ -33,7 +33,7 @@ namespace WTF {
 
 class ArrayBuffer;
 
-class Int8Array : public IntegralTypedArrayBase<signed char> {
+class Int8Array FINAL : public IntegralTypedArrayBase<signed char> {
 public:
     static inline PassRefPtr<Int8Array> create(unsigned length);
     static inline PassRefPtr<Int8Array> create(const signed char* array, unsigned length);
@@ -49,7 +49,7 @@ public:
     inline PassRefPtr<Int8Array> subarray(int start) const;
     inline PassRefPtr<Int8Array> subarray(int start, int end) const;
 
-    virtual ViewType getType() const
+    virtual ViewType getType() const OVERRIDE
     {
         return TypeInt8;
     }