Make FileReader.abort() (synchronously) follow the spec.

third_party/WebKit/Source/core/fileapi/FileReader.h

 /*
  * Copyright (C) 2010 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 52 matching lines @@
 
   enum ReadyState { kEmpty = 0, kLoading = 1, kDone = 2 };
 
   void readAsArrayBuffer(Blob*, ExceptionState&);
   void readAsBinaryString(Blob*, ExceptionState&);
   void readAsText(Blob*, const String& encoding, ExceptionState&);
   void readAsText(Blob*, ExceptionState&);
   void readAsDataURL(Blob*, ExceptionState&);
   void abort();
 
-  void doAbort();
-
   ReadyState getReadyState() const { return m_state; }
   DOMException* error() { return m_error; }
   void result(StringOrArrayBuffer& resultAttribute) const;
 
   // ActiveDOMObject
   void contextDestroyed() override;
 
   // ScriptWrappable
   bool hasPendingActivity() const final;
 
@@ skipping 48 matching lines @@
   String m_encoding;
 
   std::unique_ptr<FileReaderLoader> m_loader;
   Member<DOMException> m_error;
   double m_lastProgressNotificationTimeMS;
 };
 
 }  // namespace blink
 
 #endif  // FileReader_h