Allow keys with AltGr modifier to be inserted in Textfield

Allow keys with AltGr modifier to be inserted in Textfield

AltGr modifier is used to type alternative keys on certain keyboard
layouts so we don't consider keys with the AltGr modifier as a system
key.

R=oshima@chromium.org
BUG=529883
Committed: https://crrev.com/3d96df64780723580da4c312557b8fc4622cfd35
Cr-Commit-Position: refs/heads/master@{#349680}

[afakhry, 2015-09-18 00:51:01]

Oshima, please take a look!

[oshima, 2015-09-18 01:36:35]

can you add a unit test?

[afakhry, 2015-09-18 02:06:05]

On 2015/09/18 01:36:35, oshima wrote:
> can you add a unit test?

Done!

[oshima, 2015-09-18 02:15:38]

lgtm

[afakhry, 2015-09-18 02:20:04]

afakhry@chromium.org changed reviewers:
+ avi@chromium.org

[afakhry, 2015-09-18 02:20:04]

avi@ Can you please take a look?

[Avi (use Gerrit), 2015-09-18 03:01:38]

lgtm

[afakhry, 2015-09-18 15:53:23]

The CQ bit was checked by afakhry@chromium.org

[commit-bot: I haz the power, 2015-09-18 15:53:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1355753003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1355753003/20001

[commit-bot: I haz the power, 2015-09-18 16:00:32]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-18 16:01:06]

Patchset 2 (id:??) landed as
https://crrev.com/3d96df64780723580da4c312557b8fc4622cfd35
Cr-Commit-Position: refs/heads/master@{#349680}