Force cache SkTestScalerContext path bounds.

Force cache SkTestScalerContext path bounds.

Looks like a race on this:

http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-ASAN/builds/2608/steps/dm/logs/stdio


BUG=skia:

Committed: https://skia.googlesource.com/skia/+/6f6264fbbc15d4184c81ca94949f2d4f3efdc2c8

[mtklein_C, 2015-10-05 14:21:35]

mtklein@chromium.org changed reviewers:
+ herb@google.com

[mtklein_C, 2015-10-05 14:21:42]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2015-10-05 14:21:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1373363007/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1373363007/1

[commit-bot: I haz the power, 2015-10-05 14:21:55]

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 2015-10-05 20:21 UTC

[herb_g, 2015-10-05 14:22:41]

lgtm

[commit-bot: I haz the power, 2015-10-05 14:29:26]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/6f6264fbbc15d4184c81ca94949f2d4f3efdc2c8