Screen attribute availWidth/availHeight/width/height type changed to long

Screen attribute availWidth/availHeight/width/height type changed to long

There aren't any internal callers of these APIs and the 
changes are to remove casts.

BUG=496400
R=philipj

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=197637

[Habib Virji, 2015-06-19 14:15:11]

The CQ bit was checked by habib.virji@samsung.com to run a CQ dry run

[commit-bot: I haz the power, 2015-06-19 14:15:30]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1197733002/1

[Habib Virji, 2015-06-19 15:46:52]

Please take a look.

[commit-bot: I haz the power, 2015-06-19 16:37:14]

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

[commit-bot: I haz the power, 2015-06-19 16:37:15]

Dry run: This issue passed the CQ dry run.

[Habib Virji, 2015-06-19 16:54:46]

habib.virji@samsung.com changed reviewers:
+ rbyers@chromium.org

[Rick Byers, 2015-06-23 00:31:48]

LGTM, thanks!

Looks like there aren't any internal callers of these APIs to fix and this just
removes casts - a clear simplicity win!

[Habib Virji, 2015-06-23 07:19:06]

The CQ bit was checked by habib.virji@samsung.com

[commit-bot: I haz the power, 2015-06-23 07:19:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1197733002/1

[Habib Virji, 2015-06-23 08:07:11]

Thanks Rick, used your line in CL description.

[commit-bot: I haz the power, 2015-06-23 09:31:00]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=197637

[philipj_slow, 2015-06-23 10:46:34]

lgtm