The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a33e6a628fd8ffb610d7ccb8ff8ad06ac04be12e

commit a33e6a628fd8ffb610d7ccb8ff8ad06ac04be12e
Author: sigbjornf <sigbjornf@opera.com>
Date: Tue Nov 22 12:17:17 2016

XMLHttpRequest.abort(): follow spec wrt readyState transitions.

readyState is now only set to UNSENT if abort() is called on an object
with readyState in a DONE state.

R=tyoshino,yhirano
BUG= 667294 

Review-Url: https://codereview.chromium.org/2517173002
Cr-Commit-Position: refs/heads/master@{#433840}

[modify] https://crrev.com/a33e6a628fd8ffb610d7ccb8ff8ad06ac04be12e/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/readystatechange-and-abort.html
[modify] https://crrev.com/a33e6a628fd8ffb610d7ccb8ff8ad06ac04be12e/third_party/WebKit/LayoutTests/http/tests/xmlhttprequest/xmlhttprequest-abort-readyState-shouldNotDispatchEvent.html
[modify] https://crrev.com/a33e6a628fd8ffb610d7ccb8ff8ad06ac04be12e/third_party/WebKit/Source/core/xmlhttprequest/XMLHttpRequest.cpp