Draw SKPs in 256x256 tiles in nanobench.

Draw SKPs in 256x256 tiles in nanobench.

(This CL will certainly trigger performance regression alerts.  Tiled drawing is slower than non-tiled drawing.)

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/c7f7f467df07be73b22dbee38a59762997eb19bc

[mtklein, 2014-10-21 18:50:27]

mtklein@google.com changed reviewers:
+ mtklein@google.com, robertphillips@google.com

[mtklein, 2014-10-21 18:50:30]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-10-21 18:50:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/669983002/1

[commit-bot: I haz the power, 2014-10-21 18:51:00]

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 2014-10-22 00:51 UTC

[commit-bot: I haz the power, 2014-10-21 18:54:43]

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

[commit-bot: I haz the power, 2014-10-21 18:54:44]

Try jobs failed on following builders:
  Build-Win-VS2013-x86-Debug-Trybot on client.skia.compile
(http://build.chromium.org/p/client.skia.compile/builders/Build-Win-VS2013-x86...)

[mtklein, 2014-10-21 18:58:34]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-10-21 18:59:15]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/669983002/20001

[commit-bot: I haz the power, 2014-10-21 18:59:15]

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 2014-10-22 00:59 UTC

[robertphillips, 2014-10-21 19:27:32]

lgtm

[commit-bot: I haz the power, 2014-10-21 19:29:29]

Committed patchset #2 (id:20001) as c7f7f467df07be73b22dbee38a59762997eb19bc