Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/[fetch|fileapi]

Source/core/fetch/DocumentResourceReference.h

Index: Source/core/fetch/DocumentResourceReference.h
diff --git a/Source/core/fetch/DocumentResourceReference.h b/Source/core/fetch/DocumentResourceReference.h
index aba43e266bab563bd87bc02f0b7022745a6d9167..d67cb55bed5e333e65b79adcff9eb1574752bf94 100644
--- a/Source/core/fetch/DocumentResourceReference.h
+++ b/Source/core/fetch/DocumentResourceReference.h
@@ -31,7 +31,7 @@
 
 namespace blink {
 
-class DocumentResourceReference FINAL : public DocumentResourceClient {
+class DocumentResourceReference final : public DocumentResourceClient {
 public:
     DocumentResourceReference(DocumentResource* document) : m_document(document) { m_document->addClient(this); }
     virtual ~DocumentResourceReference() { m_document->removeClient(this); }