fix builder winding again

fix builder winding again

Record the nesting level when finding the edge winding contribution
so that inner edges can be reversed as needed.

R=fmalita@chromium.org
BUG=skia:3838
Committed: https://skia.googlesource.com/skia/+/4e1a4c9399b8bb0897218f3ec10c254d3bb97463

[caryclark, 2015-05-18 17:09:14]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2015-05-18 17:09:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1140383002/1

[commit-bot: I haz the power, 2015-05-18 17:09:36]

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 2015-05-18 23:09 UTC

[f(malita), 2015-05-18 17:29:55]

LGTM, assuming the pathops_visualizer.htm change is intentional.

[f(malita), 2015-05-18 17:29:59]

The CQ bit was unchecked by fmalita@chromium.org

[f(malita), 2015-05-18 17:31:23]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2015-05-18 17:31:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1140383002/1

[commit-bot: I haz the power, 2015-05-18 19:57:03]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/4e1a4c9399b8bb0897218f3ec10c254d3bb97463