Fix virtual/override/final usage in Source/core/{fetch,loader,streams,xmlhttprequest}/.

Source/core/xmlhttprequest/XMLHttpRequest.h

 /*
  *  Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@nypop.com>
  *  Copyright (C) 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
@@ skipping 61 matching lines @@
     , private ThreadableLoaderClient
     , public DocumentParserClient
     , public ActiveDOMObject {
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_EVENT_TARGET(XMLHttpRequest);
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(XMLHttpRequest);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(XMLHttpRequest);
 public:
     static PassRefPtrWillBeRawPtr<XMLHttpRequest> create(ScriptState*);
     static PassRefPtrWillBeRawPtr<XMLHttpRequest> create(ExecutionContext*);
-    virtual ~XMLHttpRequest();
+    ~XMLHttpRequest() override;
 
     // These exact numeric values are important because JS expects them.
     enum State {
         UNSENT = 0,
         OPENED = 1,
         HEADERS_RECEIVED = 2,
         LOADING = 3,
         DONE = 4
     };
 
     enum ResponseTypeCode {
         ResponseTypeDefault,
         ResponseTypeText,
         ResponseTypeJSON,
         ResponseTypeDocument,
         ResponseTypeBlob,
         ResponseTypeArrayBuffer,
         ResponseTypeLegacyStream,
     };
 
     // ActiveDOMObject
-    virtual void contextDestroyed() override;
-    virtual ExecutionContext* executionContext() const override;
-    virtual bool hasPendingActivity() const override;
-    virtual void suspend() override;
-    virtual void resume() override;
-    virtual void stop() override;
+    void contextDestroyed() override;
+    ExecutionContext* executionContext() const override;
+    bool hasPendingActivity() const override;
+    void suspend() override;
+    void resume() override;
+    void stop() override;
 
     // XMLHttpRequestEventTarget
-    virtual const AtomicString& interfaceName() const override;
+    const AtomicString& interfaceName() const override;
 
     // JavaScript attributes and methods
     const KURL& url() const { return m_url; }
     String statusText() const;
     int status() const;
     State readyState() const;
     bool withCredentials() const { return m_includeCredentials; }
     void setWithCredentials(bool, ExceptionState&);
     void open(const AtomicString& method, const String& url, ExceptionState&);
     void open(const AtomicString& method, const String& url, bool async, const String& username, const String& password, ExceptionState&);
@@ skipping 26 matching lines @@
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     class BlobLoader;
     XMLHttpRequest(ExecutionContext*, PassRefPtr<SecurityOrigin>);
 
     Document* document() const;
     SecurityOrigin* securityOrigin() const;
 
-    virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;
-    virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
-    virtual void didReceiveData(const char* data, unsigned dataLength) override;
+    void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;
+    void didReceiveResponse(unsigned long identifier, const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
+    void didReceiveData(const char* data, unsigned dataLength) override;
     // When responseType is set to "blob", didDownloadData() is called instead
     // of didReceiveData().
-    virtual void didDownloadData(int dataLength) override;
-    virtual void didFinishLoading(unsigned long identifier, double finishTime) override;
-    virtual void didFail(const ResourceError&) override;
-    virtual void didFailRedirectCheck() override;
+    void didDownloadData(int dataLength) override;
+    void didFinishLoading(unsigned long identifier, double finishTime) override;
+    void didFail(const ResourceError&) override;
+    void didFailRedirectCheck() override;
 
     // BlobLoader notifications.
     void didFinishLoadingInternal();
     void didFinishLoadingFromBlob();
     void didFailLoadingFromBlob();
 
     PassRefPtr<BlobDataHandle> createBlobDataHandleFromResponse();
 
     // DocumentParserClient
-    virtual void notifyParserStopped() override;
+    void notifyParserStopped() override;
 
     void endLoading();
 
     // Returns the MIME type part of m_mimeTypeOverride if present and
     // successfully parsed, or returns one of the "Content-Type" header value
     // of the received response.
     //
     // This method is named after the term "final MIME type" defined in the
     // spec but doesn't convert the result to ASCII lowercase as specified in
     // the spec. Must be lowered later or compared using case insensitive
@@ skipping 126 matching lines @@
     bool m_sameOriginRequest;
     // True iff the ongoing resource loading is using the downloadToFile
     // option.
     bool m_downloadingToFile;
     bool m_responseTextOverflow;
 };
 
 } // namespace blink
 
 #endif // XMLHttpRequest_h