[Forms] The "output" element should have labels.

According to the specification[1], the "output" element is a labelable.

* FF=FAIL
* IE=FAIL
* OP=PASS

Sample URI(http://jsfiddle.net/FP5ur/) should output only "Output(1)".

[1] http://www.whatwg.org/specs/web-apps/current-work/multipage/forms.html#category-label

Created attachment 130752 [details]
Patch 1

[Kent Tamura]

Comment on attachment 130752 [details]
Patch 1

View in context: https://bugs.webkit.org/attachment.cgi?id=130752&action=review

> LayoutTests/fast/forms/output/output-labels.html:1
> +<script src="../../js/resources/js-test-pre.js"></script>

The test coverage is not good.
I recommend you add "output" cases to existing fast/forms/labels-* tests.

> LayoutTests/fast/forms/output/output-labels.html:7
> +function collect(xs)

What does "xs" stand for?
The name "collect" is not so descriptive.

> LayoutTests/fast/forms/output/output-labels.html:14
> +{
> +  var result = '';
> +  for (var i = 0; i < xs.length; i++) {
> +    result += xs[i].id;
> +  }
> +  return result;
> +}

Wrong indentation.

[Philippe Normand]

fast/forms/label/labelable-elements.html fails partly because of this issue in GTK.

[Jessie Berlin]

Will this fix https://bugs.webkit.org/show_bug.cgi?id=80985?

[Kent Tamura]

(In reply to comment #4)
> Will this fix https://bugs.webkit.org/show_bug.cgi?id=80985?

No, this won't.  Bug 80985 is caused by ENABLE flag differences and JSC/V8 difference.

[Kent Tamura]

(In reply to comment #5)
> (In reply to comment #4)
> > Will this fix https://bugs.webkit.org/show_bug.cgi?id=80985?
> 
> No, this won't.  Bug 80985 is caused by ENABLE flag differences and JSC/V8 difference.

Correction: JSC/V8 difference will be solved by this bug. ENABLE flag difference won't be solved.

Created attachment 131772 [details]
Patch 2

[Kent Tamura]

Comment on attachment 131772 [details]
Patch 2

View in context: https://bugs.webkit.org/attachment.cgi?id=131772&action=review

The code change is ok.


> LayoutTests/platform/chromium/fast/forms/label/labelable-elements-expected.txt:48
>  Labelable: output [object HTMLOutputElement]
> -FAIL element.labels.length should be 1. Threw exception TypeError: Cannot read property 'length' of null
> +PASS element.labels.length is 1

You need to update the following files too:

LayoutTests/platform/mac/fast/forms/label/labelable-elements-expected.txt
LayoutTests/fast/forms/label/labelable-elements-expected.txt

Created attachment 131783 [details]
Patch 3

[Kent Tamura]

Comment on attachment 131783 [details]
Patch 3

ok

[WebKit Review Bot]

Comment on attachment 131783 [details]
Patch 3

Clearing flags on attachment: 131783

Committed r110664: <http://trac.webkit.org/changeset/110664>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.