Fix virtual/override/final usage in Source/modules/.

Source/modules/websockets/DocumentWebSocketChannel.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 46 matching lines @@
 #include "public/platform/WebURL.h"
 #include "public/platform/WebVector.h"
 
 using blink::WebSocketHandle;
 
 namespace blink {
 
 class DocumentWebSocketChannel::BlobLoader final : public GarbageCollectedFinalized<DocumentWebSocketChannel::BlobLoader>, public FileReaderLoaderClient {
 public:
     BlobLoader(PassRefPtr<BlobDataHandle>, DocumentWebSocketChannel*);
-    virtual ~BlobLoader() { }
+    ~BlobLoader() override { }
 
     void cancel();
 
     // FileReaderLoaderClient functions.
-    virtual void didStartLoading() override { }
-    virtual void didReceiveData() override { }
-    virtual void didFinishLoading() override;
-    virtual void didFail(FileError::ErrorCode) override;
+    void didStartLoading() override { }
+    void didReceiveData() override { }
+    void didFinishLoading() override;
+    void didFail(FileError::ErrorCode) override;
 
     DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_channel);
     }
 
 private:
     Member<DocumentWebSocketChannel> m_channel;
     FileReaderLoader m_loader;
 };
@@ skipping 490 matching lines @@
 
 DEFINE_TRACE(DocumentWebSocketChannel)
 {
     visitor->trace(m_blobLoader);
     visitor->trace(m_client);
     WebSocketChannel::trace(visitor);
     ContextLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink