Fix computation of bound in FillBounds::updateSaveBounds

Fix computation of bound in FillBounds::updateSaveBounds

intersect doesn't change the bounds when the two bounds do not intersect. This is definitely not the intended behavior.

With the SKPs captured on 12/23/14, Chrome began passing Skia drawPicture ops that did not intersect the current clip - which revealed this bug.

Committed: https://skia.googlesource.com/skia/+/c187a3c8849ba5e409f79ead21cd5bc82173d9f8

[robertphillips, 2014-12-30 21:36:21]

robertphillips@google.com changed reviewers:
+ bsalomon@google.com

[robertphillips, 2014-12-30 21:44:25]

The CQ bit was checked by robertphillips@google.com

[commit-bot: I haz the power, 2014-12-30 21:45:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/817483004/1

[commit-bot: I haz the power, 2014-12-30 21:45:05]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2014-12-31 03:45 UTC

[bsalomon, 2014-12-30 21:51:21]

lgtm

[commit-bot: I haz the power, 2014-12-30 21:53:53]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/c187a3c8849ba5e409f79ead21cd5bc82173d9f8