Revert of Create a change in external/wpt meant to be reverted (patchset #1 id:1 of https://codereview.chromium.org/2651533003/ )

[jeffcarp]

Reason for revert:
This commit was intended to be reverted to test how WPT Export handles reverted changes. See the bug for more context.

Original issue's description:

Create a change in external/wpt meant to be reverted

This is to test reverted changes in the WPT Export process.

BUG=679951

Review-Url: https://codereview.chromium.org/2651533003
Cr-Commit-Position: refs/heads/master@{#445651}
Committed: https://chromium.googlesource.com/chromium/src/+/b156b16a00574a89d85ccb034b30cdfd9cc5676a

TBR=qyearsley@chromium.org

Skipping CQ checks because original CL landed less than 1 days ago.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=679951

Review-Url: https://codereview.chromium.org/2657613002
Cr-Commit-Position: refs/heads/master@{#445762}

[wpt-pr-bot]

Notifying @Ms2ger, @ayg, @gsnedders, @jdm, @jgraham, @sideshowbarker, @zcorpan, and @zqzhang. (Learn how reviewing works.)

[wpt-stability-bot]

Chrome (unstable channel)

Testing web-platform-tests at revision 8a2740a1b8b63300ed3a11137ad977f07ef1c72b
Using browser at version 55.0.2883.75
Starting 10 test iterations
All results were stable

All results

/html/semantics/forms/the-input-element/checkbox.html

Subtest	Results
	OK
pre-activation steps on checked checkbox	PASS
canceled activation steps on unchecked checkbox	PASS
click on mutable checkbox fires a click event, then an input event, then a change event	FAIL
pre-activation steps on unchecked checkbox	PASS
click on non-mutable checkbox doesn't fire the input or change event	PASS
canceled activation steps on unchecked checkbox (indeterminate=true in onclick)	PASS

[wpt-stability-bot]

Firefox (nightly channel)

Testing web-platform-tests at revision 8a2740a1b8b63300ed3a11137ad977f07ef1c72b
Using browser at version BuildID 20170123125947; SourceStamp 36486fdc3813ef7943ae5b07b4128866d1938a6c
Starting 10 test iterations
All results were stable

All results

/html/semantics/forms/the-input-element/checkbox.html

Subtest	Results
	OK
pre-activation steps on checked checkbox	PASS
canceled activation steps on unchecked checkbox	PASS
click on mutable checkbox fires a click event, then an input event, then a change event	PASS
pre-activation steps on unchecked checkbox	PASS
click on non-mutable checkbox doesn't fire the input or change event	PASS
canceled activation steps on unchecked checkbox (indeterminate=true in onclick)	PASS