Update bindings classes to use OVERRIDE / FINAL when needed

Source/bindings/v8/custom/V8ArrayBufferCustom.h

Index: Source/bindings/v8/custom/V8ArrayBufferCustom.h
diff --git a/Source/bindings/v8/custom/V8ArrayBufferCustom.h b/Source/bindings/v8/custom/V8ArrayBufferCustom.h
index 2c5ff8e1cac3e03b2ff6e051a9e07556cb35d349..759da93ec09cec1af4bc5bac9e14d4e9bf8989f5 100644
--- a/Source/bindings/v8/custom/V8ArrayBufferCustom.h
+++ b/Source/bindings/v8/custom/V8ArrayBufferCustom.h
@@ -34,9 +34,9 @@
 
 namespace WebCore {
 
-class V8ArrayBufferDeallocationObserver: public WTF::ArrayBufferDeallocationObserver {
+class V8ArrayBufferDeallocationObserver FINAL: public WTF::ArrayBufferDeallocationObserver {
 public:
-    virtual void arrayBufferDeallocated(unsigned sizeInBytes)
+    virtual void arrayBufferDeallocated(unsigned sizeInBytes) OVERRIDE
     {
         v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(-static_cast<int>(sizeInBytes));
     }