Roll Skia from d73f688f61ea to 6c6592c338b6 (1 revision)

https://skia.googlesource.com/skia.git/+log/d73f688f61ea..6c6592c338b6

2020-05-21 nifong@google.com Upgrade to emscripten 1.39.16

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: Ie64ee88ce2c9948b960840d0f8ae59eebf75bfd1
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/291605
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 5c567c8..37364dd 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': 'd73f688f61ea94e2ba3a6260230dad6eca62f22d',
+  'skia_revision': '6c6592c338b6ac8033c1717336f68e3516ffece8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.