Remove work around for AppCompat switch thumb issues

Remove work around for AppCompat switch thumb issues

Original work around done in: crbug.com/455327 and crbug.com/459782

BUG=440601
Committed: https://crrev.com/821dbcff61cfb0ab1d602ef505b9545599a86410
Cr-Commit-Position: refs/heads/master@{#321385}

[Theresa, 2015-03-18 19:42:12]

twellington@chromium.org changed reviewers:
+ aurimas@chromium.org

[aurimas (slooooooooow), 2015-03-18 20:05:34]

lgtm

[Theresa, 2015-03-18 20:24:52]

The CQ bit was checked by twellington@chromium.org

[commit-bot: I haz the power, 2015-03-18 20:25:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1019593002/1

[commit-bot: I haz the power, 2015-03-18 21:04:07]

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

[commit-bot: I haz the power, 2015-03-18 21:04:08]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Theresa, 2015-03-19 13:43:47]

twellington@chromium.org changed reviewers:
+ newt@chromium.org

[Theresa, 2015-03-19 13:43:47]

newt@ ptal - I need at lgtm from an owner

[newt (away), 2015-03-19 17:15:33]

lgtm

[newt (away), 2015-03-19 17:15:38]

The CQ bit was checked by newt@chromium.org

[commit-bot: I haz the power, 2015-03-19 17:15:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1019593002/1

[commit-bot: I haz the power, 2015-03-19 17:20:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-19 17:20:48]

Patchset 1 (id:??) landed as
https://crrev.com/821dbcff61cfb0ab1d602ef505b9545599a86410
Cr-Commit-Position: refs/heads/master@{#321385}