Input element: Fix the dirty value flag after type change.

Input element: Fix the dirty value flag after type change.

When the input type was changed from type=hidden, of which value-mode is
"default", to type=text, of which value-mode is "value", we incorrectly set
dirty value flag to true.

This CL fixes it.

Specification:
https://html.spec.whatwg.org/multipage/forms.html#input-type-change

BUG=655412
Committed: https://crrev.com/2cabef4e7d4a0b298a114add1298920cc0cfb321
Cr-Commit-Position: refs/heads/master@{#424936}

[tkent, 2016-10-13 00:40:56]

The CQ bit was checked by tkent@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-13 00:41:04]

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

[tkent, 2016-10-13 01:35:38]

tkent@chromium.org changed reviewers:
+ keishi@chromium.org

[tkent, 2016-10-13 01:35:39]

keishi@, would you review this please?

[keishi, 2016-10-13 01:39:15]

LGTM

[commit-bot: I haz the power, 2016-10-13 01:47:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-13 01:47:36]

Dry run: This issue passed the CQ dry run.

[tkent, 2016-10-13 01:48:06]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2016-10-13 01:48:22]

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, 2016-10-13 01:54:32]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-13 01:56:19]

Description was changed from

==========
Input element: Fix the dirty value flag after type change.

When the input type was changed from type=hidden, of which value-mode is
"default", to type=text, of which value-mode is "value", we incorrectly set
dirty value flag to true.

This CL fixes it.

Specification:
https://html.spec.whatwg.org/multipage/forms.html#input-type-change

BUG=655412
==========

to

==========
Input element: Fix the dirty value flag after type change.

When the input type was changed from type=hidden, of which value-mode is
"default", to type=text, of which value-mode is "value", we incorrectly set
dirty value flag to true.

This CL fixes it.

Specification:
https://html.spec.whatwg.org/multipage/forms.html#input-type-change

BUG=655412

Committed: https://crrev.com/2cabef4e7d4a0b298a114add1298920cc0cfb321
Cr-Commit-Position: refs/heads/master@{#424936}
==========

[commit-bot: I haz the power, 2016-10-13 01:56:19]

Patchset 1 (id:??) landed as
https://crrev.com/2cabef4e7d4a0b298a114add1298920cc0cfb321
Cr-Commit-Position: refs/heads/master@{#424936}