Add test that transitionend is not fired after element is made display:none

[cvrebert]

See also http://crbug.com/437860, http://bugzil.la/1182856

[syncbot]

Automatic validation checks of commit 2c5b879 discovered the following problem:

In css-transitions-1/events-007.html:

• Missing anchor for specification link to css-transitions-2.

[syncbot]

Automatic validation checks of commit 4da3ba2 passed.

[cvrebert]

CC: @dbaron (as an Editor of the relevant specs)

[cvrebert]

CC: @tabatkins (as the one who proposed the relevant behavior clarification)

[dbaron]

Is this two copies of the same test? If so, why? Seems better to just have one copy, tagged for level 1 of transitions (i.e., css3-transitions).

[syncbot]

Automatic validation checks of commit 398a470 passed.

[cvrebert]

@dbaron I wasn't sure which level the spec clarification applied to. I've now removed the css-transitions-2 copy.

[dbaron]

Did you test the test locally to see that it behaves as you expect?

I'm a little confused since part of the test uses a variable called "div" and part uses a variable called "e", which looks like it's meant to be the same thing. I'd think that running the JS would throw an exception when trying to access e.className when e is undefined, although maybe I'm missing something.

[syncbot]

Automatic validation checks of commit 5abb23e passed.

[syncbot]

Automatic validation checks of commit 14c0fb8 passed.

[cvrebert]

@dbaron No, you're right. This is what I get for trying to rename a variable late in the game. Fixed that and re-tested locally; it works.
Convenient live copy of the test: http://jsbin.com/hivira/edit?html,output

[cvrebert]

Thank you