Fix SkDrawTextBlobCommand null blob crash

Fix SkDrawTextBlobCommand null blob crash

After https://codereview.chromium.org/2335493005, we're moving the param
into a local field -> we should no longer access it.

TBR=robertphillips@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2344523003

Committed: https://skia.googlesource.com/skia/+/02526bd5aafa3503629d993cec6a9b76a106c213

[f(malita), 2016-09-14 21:21:43]

Description was changed from

==========
Fix SkDrawTextBlobCommand null blob crash

After https://codereview.chromium.org/2335493005, we're moving the param
into a local field -> we should no longer access it.

TBR=robertphillips@google.com
==========

to

==========
Fix SkDrawTextBlobCommand null blob crash

After https://codereview.chromium.org/2335493005, we're moving the param
into a local field -> we should no longer access it.

TBR=robertphillips@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2344523003
==========

[f(malita), 2016-09-14 21:24:28]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2016-09-14 21:24:38]

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, 2016-09-14 21:56:01]

Description was changed from

==========
Fix SkDrawTextBlobCommand null blob crash

After https://codereview.chromium.org/2335493005, we're moving the param
into a local field -> we should no longer access it.

TBR=robertphillips@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2344523003
==========

to

==========
Fix SkDrawTextBlobCommand null blob crash

After https://codereview.chromium.org/2335493005, we're moving the param
into a local field -> we should no longer access it.

TBR=robertphillips@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2344523003

Committed:
https://skia.googlesource.com/skia/+/02526bd5aafa3503629d993cec6a9b76a106c213
==========

[commit-bot: I haz the power, 2016-09-14 21:56:01]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/02526bd5aafa3503629d993cec6a9b76a106c213

[robertphillips, 2016-09-15 12:09:54]

lgtm