Roll Skia from a7a944310408 to b6a7319f211c (1 revision)

https://skia.googlesource.com/skia.git/+log/a7a944310408..b6a7319f211c

2021-07-21 johnstiles@google.com Add tokens for highp/mediump/lowp.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-skiabot-test-autoroll
Please CC borenet@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: borenet@google.com
Change-Id: Ieceb2fc5607ed2d53671a864036fb01ba261daa0
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/430924
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index d51eb96..f196f40 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': 'a7a9443104084fc47e3a31b2172ce21ca88f4b44',
+  'skia_revision': 'b6a7319f211c3ed2e16a8000281ed65005627c63',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.