Update remaining core classes to use OVERRIDE / FINAL when needed

Source/core/fileapi/FileReader.h

Index: Source/core/fileapi/FileReader.h
diff --git a/Source/core/fileapi/FileReader.h b/Source/core/fileapi/FileReader.h
index 65fd97aa18a4a24bcd0cb9819afd3522341cb615..a4d46df9067b162efc4adc56aac97ec1e674f56b 100644
--- a/Source/core/fileapi/FileReader.h
+++ b/Source/core/fileapi/FileReader.h
@@ -48,7 +48,7 @@ class Blob;
 class ExceptionState;
 class ExecutionContext;
 
-class FileReader : public RefCounted<FileReader>, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public FileReaderLoaderClient {
+class FileReader FINAL : public RefCounted<FileReader>, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public FileReaderLoaderClient {
     REFCOUNTED_EVENT_TARGET(FileReader);
 public:
     static PassRefPtr<FileReader> create(ExecutionContext*);
@@ -77,17 +77,17 @@ public:
     String stringResult();
 
     // ActiveDOMObject
-    virtual void stop();
+    virtual void stop() OVERRIDE;
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
 
     // FileReaderLoaderClient
-    virtual void didStartLoading();
-    virtual void didReceiveData();
-    virtual void didFinishLoading();
-    virtual void didFail(FileError::ErrorCode);
+    virtual void didStartLoading() OVERRIDE;
+    virtual void didReceiveData() OVERRIDE;
+    virtual void didFinishLoading() OVERRIDE;
+    virtual void didFail(FileError::ErrorCode) OVERRIDE;
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(loadstart);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(progress);