[HTML Imports] Make HTMLLinkElement.import a Document.

[HTML Imports] Make HTMLLinkElement.import a Document.

This follows spec change on https://www.w3.org/Bugs/Public/show_bug.cgi?id=22305
which asks imported fragment should be imported "document" to allow it to have
URL and other APIs.

BUG=240592
TEST=imported-document.html
R=dglazkov@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=152614

[Hajime Morrita, 2013-06-13 07:27:35]

Could you take a look? Turning DocumentFragment back to Document.

[dglazkov, 2013-06-17 02:04:21]

LGTM. I would really like for us to get a better sense from Elliott and Mozilla
folks on this change. We haven't heard much.

https://codereview.chromium.org/16936002/diff/1/LayoutTests/http/tests/resour...
File LayoutTests/http/tests/resources/testharness.css (right):

https://codereview.chromium.org/16936002/diff/1/LayoutTests/http/tests/resour...
LayoutTests/http/tests/resources/testharness.css:1: html {
What is happening with these files in tests/resources? They don't seem to have
any diffs in them, yet they show up in the patch.

[Hajime Morrita, 2013-06-17 02:15:57]

On 2013/06/17 02:04:21, Dimitri Glazkov wrote:
> LGTM. I would really like for us to get a better sense from Elliott and
Mozilla
> folks on this change. We haven't heard much.
> 

True. Probably we should ask them on the bug before landing.

>
https://codereview.chromium.org/16936002/diff/1/LayoutTests/http/tests/resour...
> File LayoutTests/http/tests/resources/testharness.css (right):
> 
>
https://codereview.chromium.org/16936002/diff/1/LayoutTests/http/tests/resour...
> LayoutTests/http/tests/resources/testharness.css:1: html {
> What is happening with these files in tests/resources? They don't seem to have
> any diffs in them, yet they show up in the patch.

Oh, I copied them from LayoutTests/resources because they weren't there.
I'm adopting testharness.js over js-test-pre.js for making possible upstreaming
of the testsuite easy.

[Hajime Morrita, 2013-06-18 07:05:18]

Seeing no response so far. I'd land this and continue exploring current design.

[commit-bot: I haz the power, 2013-06-18 07:05:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/morrita@chromium.org/16936002/1

[commit-bot: I haz the power, 2013-06-18 07:17:55]

Retried try job too often on blink_presubmit for step(s) presubmit
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=blink_pres...

[Hajime Morrita, 2013-06-18 07:30:00]

Committed patchset #1 manually as r152614 (presubmit successful).