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

Source/core/fetch/TextResource.h

Index: Source/core/fetch/TextResource.h
diff --git a/Source/core/fetch/TextResource.h b/Source/core/fetch/TextResource.h
index f6fa268d0e54f840141cb3ad3837cfdf8cc179de..9ebf9f612c863d175c47650fcd2162bc072f81b7 100644
--- a/Source/core/fetch/TextResource.h
+++ b/Source/core/fetch/TextResource.h
@@ -17,8 +17,8 @@ public:
     // call time.
     String decodedText() const;
 
-    virtual void setEncoding(const String&) OVERRIDE;
-    virtual String encoding() const OVERRIDE;
+    virtual void setEncoding(const String&) override;
+    virtual String encoding() const override;
 
 protected:
     TextResource(const ResourceRequest&, Type, const String& mimeType, const String& charset);