notice null colorfilter in legacy unflattening

notice null colorfilter in legacy unflattening

BUG=skia:3117
Committed: https://skia.googlesource.com/skia/+/b969fc0f83528c26c6fdf1cbe8b45fb9a4d8a858

[reed1, 2014-11-11 21:02:07]

reed@google.com changed reviewers:
+ junov@google.com, senorblanco@google.com

[reed1, 2014-11-11 21:04:20]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-11-11 21:04:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/691383003/1

[commit-bot: I haz the power, 2014-11-11 21:04:54]

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 2014-11-12 03:04 UTC

[Stephen White, 2014-11-11 21:08:01]

Code looks ok. Unit test please?

[reed1, 2014-11-11 21:09:20]

Not sure how, since the data that triggers is by definition built with an older
version of skia. However, this does get tested by our bots (see the bug), so in
that sense the test for this already exists.

[Stephen White, 2014-11-11 21:12:03]

Hmm. It does seem a bit worrying that we were creating SKPs with NULL
colorfilters from Chrome. I hope there's not something deeper there.

But LGTM for now.

[commit-bot: I haz the power, 2014-11-11 21:13:40]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/b969fc0f83528c26c6fdf1cbe8b45fb9a4d8a858