Roll Skia from 6c6592c338b6 to 7b4ea9b61222 (1 revision)

https://skia.googlesource.com/skia.git/+log/6c6592c338b6..7b4ea9b61222

2020-05-21 herb@google.com Light cleanup of GrTextBlob cache

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/master/autoroll/README.md

Tbr: borenet@google.com
Change-Id: Ib85cc06941c3a11b3d0ee8a5583f56b227d96749
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/291606
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 37364dd..847651e 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': '6c6592c338b6ac8033c1717336f68e3516ffece8',
+  'skia_revision': '7b4ea9b61222c7ea4fd9e197eb46ffe601edca83',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.