Roll src/third_party/skia 647c7a97d32d..25f416465e8d (4 commits)

https://skia.googlesource.com/skia.git/+log/647c7a97d32d..25f416465e8d

git log 647c7a97d32d..25f416465e8d --date=short --no-merges --format='%ad %ae %s'
2019-10-07 brianosman@google.com Add particles gallery to skia.org site
2019-10-07 jlavrova@google.com Adding line/style metrics
2019-10-07 fmalita@chromium.org [skottie] Horizontal-constraint for Shaper *ToFit alignment modes
2019-10-07 borenet@google.com Update go deps

Created with:
  gclient setdep -r src/third_party/skia@25f416465e8d

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 kjlubick@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=kjlubick@google.com

Bug: None
Change-Id: Ieb57f56e11f3e7970df0f4855579aad707df1ef8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1844120Reviewed-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@{#703382}

DEPS

@@ -167,7 +167,7 @@ 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': '647c7a97d32d2ac39150b067f17bcfeddcb189da',
+  'skia_revision': '25f416465e8dfcfbd251f3015bf527fd0a2554a4',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.