Expose the GamepadButton interface object

Expose the GamepadButton interface object

https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html#gamepadbutton-interface

IE and Firefox already expose this interface object.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=188694

[philipj_slow, 2015-01-19 14:27:29]

philipj@opera.com changed reviewers:
+ bajones@chromium.org

[philipj_slow, 2015-01-19 14:27:29]

PTAL

[bajones, 2015-01-20 18:04:26]

lgtm

[philipj_slow, 2015-01-20 20:18:35]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2015-01-20 20:19:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/859503004/1

[commit-bot: I haz the power, 2015-01-20 20:56:32]

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

[commit-bot: I haz the power, 2015-01-20 20:56:34]

Failed to commit the patch.
svn: E155010: Commit failed (details follow):
svn: E155010:
'/b/infra_internal/commit_queue/workdir/blink/LayoutTests/platform/linux/fast/masking'
is scheduled for addition, but is missing

[commit-bot: I haz the power, 2015-01-20 20:56:39]

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

[philipj_slow, 2015-01-20 21:05:53]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2015-01-20 21:06:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/859503004/1

[commit-bot: I haz the power, 2015-01-20 21:07:09]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=188694