FileReader.abort() should not fire an error event.

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

 /*
  * 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 325 matching lines @@
 
   AutoReset<bool> firingEvents(&m_stillFiringEvents, true);
 
   // Setting error implicitly makes |result| return null.
   m_error = FileError::createDOMException(FileError::kAbortErr);
 
   // Unregister the reader.
   ThrottlingController::FinishReaderType finalStep =
       ThrottlingController::removeReader(getExecutionContext(), this);
 
-  fireEvent(EventTypeNames::error);
   fireEvent(EventTypeNames::abort);
   fireEvent(EventTypeNames::loadend);
 
   // All possible events have fired and we're done, no more pending activity.
   ThrottlingController::finishReader(getExecutionContext(), this, finalStep);
 
   // ..but perform the loader cancellation asynchronously as abort() could be
   // called from the event handler and we do not want the resource loading code
   // to be on the stack when doing so. The persistent reference keeps the
   // reader alive until the task has completed.
@@ skipping 112 matching lines @@
         ProgressEvent::create(type, false, m_loader->bytesLoaded(), 0));
 }
 
 DEFINE_TRACE(FileReader) {
   visitor->trace(m_error);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink