Gallery: replace paper-input of rename field with HTMLInputElement.

Gallery: replace paper-input of rename field with HTMLInputElement.

Since ChromeVox does not support Shadow DOM for now, paper-input with
Shadow DOM is not accessible. As temporary solution until it supports
Shadow DOM, we replace paper-input with HTMLInputElement.

BUG=517774
TEST=none

Committed: https://crrev.com/d783daa13d1ed54dcaf98c9e1e6c9905a145e0bb
Cr-Commit-Position: refs/heads/master@{#342322}

[yawano, 2015-08-07 08:39:32]

yawano@chromium.org changed reviewers:
+ fukino@chromium.org

[yawano, 2015-08-07 08:39:33]

PTAL. Thank you!

[fukino, 2015-08-07 08:44:50]

lgtm!

[yawano, 2015-08-07 08:45:40]

On 2015/08/07 08:44:50, fukino wrote:
> lgtm!

Thank you!

[yawano, 2015-08-07 08:45:43]

The CQ bit was checked by yawano@chromium.org

[commit-bot: I haz the power, 2015-08-07 08:45:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1275323002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1275323002/1

[commit-bot: I haz the power, 2015-08-07 09:08:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-07 09:09:08]

Patchset 1 (id:??) landed as
https://crrev.com/d783daa13d1ed54dcaf98c9e1e6c9905a145e0bb
Cr-Commit-Position: refs/heads/master@{#342322}