[Match Spec] Form element pointer should not be updated w/in <template>

[Match Spec] Form element pointer should not be updated w/in <template>

This CL updates Blink HTML Parser to better match the spec.
re: http://html5.org/tools/web-apps-tracker?from=8330&to=8331

The LayoutTest is based on WebKit change by rniwa@webkit.org:
https://trac.webkit.org/changeset/160182

Bonus:
- HTMLConstructionSite::setForm is merged into initFragmentParsing

BUG=326058
Committed: https://crrev.com/8c33eb043f0c585eaea4629e360a257bb534d336
Cr-Commit-Position: refs/heads/master@{#405065}

[kouhei (in TOK), 2016-07-13 05:48:28]

kouhei@chromium.org changed reviewers:
+ dominicc@chromium.org, hayato@chromium.org

[hayato, 2016-07-13 06:14:03]

lgtm

[dominicc (has gone to gerrit), 2016-07-13 06:15:51]

The CQ bit was checked by dominicc@chromium.org

[dominicc (has gone to gerrit), 2016-07-13 06:15:51]

lgtm

Splendid.

[commit-bot: I haz the power, 2016-07-13 06:16:09]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-13 07:13:13]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-13 07:13:21]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-13 07:14:54]

Description was changed from

==========
[Match Spec] Form element pointer should not be updated w/in <template>

This CL updates Blink HTML Parser to better match the spec.
re: http://html5.org/tools/web-apps-tracker?from=8330&to=8331

The LayoutTest is based on WebKit change by rniwa@webkit.org:
https://trac.webkit.org/changeset/160182

Bonus:
- HTMLConstructionSite::setForm is merged into initFragmentParsing

BUG=326058
==========

to

==========
[Match Spec] Form element pointer should not be updated w/in <template>

This CL updates Blink HTML Parser to better match the spec.
re: http://html5.org/tools/web-apps-tracker?from=8330&to=8331

The LayoutTest is based on WebKit change by rniwa@webkit.org:
https://trac.webkit.org/changeset/160182

Bonus:
- HTMLConstructionSite::setForm is merged into initFragmentParsing

BUG=326058

Committed: https://crrev.com/8c33eb043f0c585eaea4629e360a257bb534d336
Cr-Commit-Position: refs/heads/master@{#405065}
==========

[commit-bot: I haz the power, 2016-07-13 07:14:55]

Patchset 2 (id:??) landed as
https://crrev.com/8c33eb043f0c585eaea4629e360a257bb534d336
Cr-Commit-Position: refs/heads/master@{#405065}