modify nothingToDraw to notice filters

modify nothingToDraw to notice filters

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/d5688c509293a450c058e0cc1f4673be2931bb5c

[reed1, 2014-11-11 15:31:23]

reed@google.com changed reviewers:
+ djsollen@google.com

[reed1, 2014-11-11 15:31:28]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-11-11 15:32:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/717753002/1

[commit-bot: I haz the power, 2014-11-11 15:32:32]

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 2014-11-11 21:32 UTC

[djsollen, 2014-11-11 18:59:05]

lgtm

[commit-bot: I haz the power, 2014-11-11 19:01:03]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/d5688c509293a450c058e0cc1f4673be2931bb5c

[mtklein, 2014-11-11 20:12:27]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/717813002/ by mtklein@google.com.

The reason for reverting is: modecolorfilters, perhaps more changed.