Roll src/third_party/skia ff2f380fd37a..684929ceb1a6 (2 commits)

https://skia.googlesource.com/skia.git/+log/ff2f380fd37a..684929ceb1a6

git log ff2f380fd37a..684929ceb1a6 --date=short --no-merges --format='%ad %ae %s'
2019-11-18 fmalita@chromium.org [skottie] Fix single-node camera orientation relative to z=0 plane
2019-11-18 jsimmons@google.com Use the default font family if no match is found for any of the families in the text style

Created with:
  gclient setdep -r src/third_party/skia@684929ceb1a6

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-autoroll
Please CC robertphillips@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/+/master/autoroll/README.md

CQ_INCLUDE_TRYBOTS=luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux-blink-rel;luci.chromium.try:linux-chromeos-compile-dbg;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
TBR=robertphillips@google.com

Bug: None
Change-Id: I7a2f48c0a1c1283f9ada9db6b57bfd28a9395763
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1922769Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#716453}

DEPS

@@ -172,7 +172,7 @@ vars = {
   # 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': 'ff2f380fd37a9b81bb1ac247c5232f1ea5487213',
+  'skia_revision': '684929ceb1a659618e9b7f5e0dd39e5c93e1479b',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.