Canvas2d: Remove the updateAccessibility() method in HitRegion class.

Canvas2d: Remove the updateAccessibility() method in HitRegion class.

The method is duplicated with updateFocusRingElementAccessibility() in CRC2D.
So, this CL is removing the duplicated method from HitRegion and renaming
updateFocusRingElementAccessibility() to updateElementAccessibility().

BUG=328961
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=198901

[zino, 2015-07-14 14:40:59]

The CQ bit was checked by jinho.bang@samsung.com to run a CQ dry run

[zino, 2015-07-14 14:41:10]

The CQ bit was unchecked by jinho.bang@samsung.com

[zino, 2015-07-14 15:14:17]

jinho.bang@samsung.com changed reviewers:
+ junov@chromium.org

[zino, 2015-07-14 15:14:18]

Please take a look.

Thank you.

[Justin Novosad, 2015-07-14 18:36:22]

On 2015/07/14 15:14:18, zino wrote:
> Please take a look.
> 
> Thank you.

lgtm

[zino, 2015-07-15 00:31:45]

The CQ bit was checked by jinho.bang@samsung.com

[commit-bot: I haz the power, 2015-07-15 00:32:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1240663002/20001

[commit-bot: I haz the power, 2015-07-15 00:58:50]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=198901