Improve performance of HTMLSelectElement::deselectItemsWithoutValidation().

Improve performance of HTMLSelectElement::deselectItemsWithoutValidation().

This CL improves it in a case of single-selection menulist SELECTs.

blink_perf.dom select-single-add.html:
  585.9 runs/s -> 655.3 runs/s

BUG=577989
Committed: https://crrev.com/439d35f66c036c88a298395fb0e5ab144d45acc6
Cr-Commit-Position: refs/heads/master@{#403856}

[tkent, 2016-07-06 05:35:09]

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

[tkent, 2016-07-06 05:35:09]

Hattori-san, would you review this please?

[keishi, 2016-07-06 06:08:29]

LGTM

[tkent, 2016-07-06 06:27:56]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2016-07-06 06:28:19]

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, 2016-07-06 06:37:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-06 06:39:11]

Description was changed from

==========
Improve performance of HTMLSelectElement::deselectItemsWithoutValidation().

This CL improves it in a case of single-selection menulist SELECTs.

blink_perf.dom select-single-add.html:
  585.9 runs/s -> 655.3 runs/s

BUG=577989
==========

to

==========
Improve performance of HTMLSelectElement::deselectItemsWithoutValidation().

This CL improves it in a case of single-selection menulist SELECTs.

blink_perf.dom select-single-add.html:
  585.9 runs/s -> 655.3 runs/s

BUG=577989

Committed: https://crrev.com/439d35f66c036c88a298395fb0e5ab144d45acc6
Cr-Commit-Position: refs/heads/master@{#403856}
==========

[commit-bot: I haz the power, 2016-07-06 06:39:12]

Patchset 1 (id:??) landed as
https://crrev.com/439d35f66c036c88a298395fb0e5ab144d45acc6
Cr-Commit-Position: refs/heads/master@{#403856}