cc: Fix ScrollbarLayer overflow

cc: Fix ScrollbarLayer overflow

During clamping to the max texture size, if scaling saturates
scaled_bounds width or height to MAX_INT, then we weren't clamping
correctly for bounds().height() > width.

BUG=541528
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/99d9eeb9ad625be61df8e960e03284136b2bc769
Cr-Commit-Position: refs/heads/master@{#353633}

[no sievers, 2015-10-09 23:45:33]

sievers@chromium.org changed reviewers:
+ danakj@chromium.org

[no sievers, 2015-10-09 23:45:39]

ptal

[danakj, 2015-10-12 21:21:49]

Can unit test? LGTM for the change.

[no sievers, 2015-10-12 22:32:47]

On 2015/10/12 21:21:49, danakj wrote:
> Can unit test? LGTM for the change.

Done.

[danakj, 2015-10-12 22:35:06]

LGTM

[no sievers, 2015-10-12 22:40:36]

The CQ bit was checked by sievers@chromium.org

[commit-bot: I haz the power, 2015-10-12 22:41:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1402653002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1402653002/20001

[commit-bot: I haz the power, 2015-10-12 23:57:06]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-10-12 23:57:46]

Patchset 2 (id:??) landed as
https://crrev.com/99d9eeb9ad625be61df8e960e03284136b2bc769
Cr-Commit-Position: refs/heads/master@{#353633}