Revert of fix misc asserts and checks found by fuzzer

Revert of fix misc asserts and checks found by fuzzer (patchset #1 id:1 of https://codereview.chromium.org/1719913002/ )

Reason for revert:
Looks to be causing failures in LayerTreeHostFilters* tests (https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_ng/builds/177297/steps/cc_unittests%20%28with%20patch%29/logs/stdio).

Original issue's description:
> fix misc asserts and checks found by fuzzer
> 
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1713383002
> 
> TBR=
> 
> Committed: https://skia.googlesource.com/skia/+/653db51b440491b0fb1908bf5a43dcc89c90044d

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/23e7af0e8ab8377b28e1399b4950def672284724

[ethannicholas, 2016-02-22 15:42:01]

Created Revert of fix misc asserts and checks found by fuzzer

[commit-bot: I haz the power, 2016-02-22 15:42:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1721743002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1721743002/1

[commit-bot: I haz the power, 2016-02-22 15:42:20]

Description was changed from

==========
Revert of fix misc asserts and checks found by fuzzer (patchset #1 id:1 of
https://codereview.chromium.org/1719913002/ )

Reason for revert:
Looks to be causing failures in LayerTreeHostFilters* tests
(https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel...).

Original issue's description:
> fix misc asserts and checks found by fuzzer
> 
> BUG=skia:
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> TBR=
> 
> Committed:
https://skia.googlesource.com/skia/+/653db51b440491b0fb1908bf5a43dcc89c90044d

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:
==========

to

==========
Revert of fix misc asserts and checks found by fuzzer (patchset #1 id:1 of
https://codereview.chromium.org/1719913002/ )

Reason for revert:
Looks to be causing failures in LayerTreeHostFilters* tests
(https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel...).

Original issue's description:
> fix misc asserts and checks found by fuzzer
> 
> BUG=skia:
> GOLD_TRYBOT_URL=
https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&is...
> 
> TBR=
> 
> Committed:
https://skia.googlesource.com/skia/+/653db51b440491b0fb1908bf5a43dcc89c90044d

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed:
https://skia.googlesource.com/skia/+/23e7af0e8ab8377b28e1399b4950def672284724
==========

[commit-bot: I haz the power, 2016-02-22 15:42:21]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/23e7af0e8ab8377b28e1399b4950def672284724