fix fuzzers

fix fuzzers

Many old pathops-related fuzz failures have built up while
the codebase was under a state a flux. Now that the code
is stable, address these failures.

Most of the CL plumbs the debug global state to downstream
routines so that, if the data is not trusted (ala fuzzed)
the function can safely exit without asserting.

TBR=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426173002

Committed: https://skia.googlesource.com/skia/+/a35ab3e6e024d0b548ded26a2e3b8ecd838ead93

[caryclark, 2016-10-18 21:40:44]

Description was changed from

==========
wip; get past more kevin fuzzers

BUG=skia:
==========

to

==========
wip; get past more kevin fuzzers

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426173002
==========

[caryclark, 2016-10-19 16:40:19]

Description was changed from

==========
wip; get past more kevin fuzzers

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426173002
==========

to

==========
fix fuzzers

Many old pathops-related fuzz failures have built up while
the codebase was under a state a flux. Now that the code
is stable, address these failures.

Most of the CL plumbs the debug global state to downstream
routines so that, if the data is not trusted (ala fuzzed)
the function can safely exit without asserting.

TBR=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426173002
==========

[caryclark, 2016-10-19 16:45:38]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2016-10-19 16:45:43]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-19 16:47:52]

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

[commit-bot: I haz the power, 2016-10-19 16:47:53]

Try jobs failed on following builders:
  Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-GN-Trybot on master.client.skia
(JOB_FAILED,
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2...)

[caryclark, 2016-10-19 17:04:21]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2016-10-19 17:04:29]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-19 17:10:16]

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

[commit-bot: I haz the power, 2016-10-19 17:10:17]

Try jobs failed on following builders:
  Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-GN-Trybot on master.client.skia
(JOB_FAILED,
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2...)

[caryclark, 2016-10-19 17:16:32]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2016-10-19 17:16:37]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-19 17:20:26]

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

[commit-bot: I haz the power, 2016-10-19 17:20:27]

Try jobs failed on following builders:
  Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-GN-Trybot on master.client.skia
(JOB_FAILED,
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2...)

[caryclark, 2016-10-20 14:56:26]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2016-10-20 14:56:31]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-20 14:58:39]

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

[commit-bot: I haz the power, 2016-10-20 14:58:40]

Try jobs failed on following builders:
  Build-Mac-Clang-x86_64-Release-GN-Trybot on master.client.skia.compile
(JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Mac-Clang-x86_...)

[caryclark, 2016-10-20 15:11:12]

The CQ bit was checked by caryclark@google.com

[commit-bot: I haz the power, 2016-10-20 15:11:23]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-10-20 15:32:21]

Description was changed from

==========
fix fuzzers

Many old pathops-related fuzz failures have built up while
the codebase was under a state a flux. Now that the code
is stable, address these failures.

Most of the CL plumbs the debug global state to downstream
routines so that, if the data is not trusted (ala fuzzed)
the function can safely exit without asserting.

TBR=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426173002
==========

to

==========
fix fuzzers

Many old pathops-related fuzz failures have built up while
the codebase was under a state a flux. Now that the code
is stable, address these failures.

Most of the CL plumbs the debug global state to downstream
routines so that, if the data is not trusted (ala fuzzed)
the function can safely exit without asserting.

TBR=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2426173002

Committed:
https://skia.googlesource.com/skia/+/a35ab3e6e024d0b548ded26a2e3b8ecd838ead93
==========

[commit-bot: I haz the power, 2016-10-20 15:32:22]

Committed patchset #14 (id:250001) as
https://skia.googlesource.com/skia/+/a35ab3e6e024d0b548ded26a2e3b8ecd838ead93