Roll src/third_party/skia c1bb9cba16be..3c4a9d347da1 (4 commits)

https://skia.googlesource.com/skia.git/+log/c1bb9cba16be..3c4a9d347da1

git log c1bb9cba16be..3c4a9d347da1 --date=short --first-parent --format='%ad %ae %s'
2020-02-18 benjaminwagner@google.com Run fetch-gn in PRESUBMIT if needed
2020-02-18 benjaminwagner@google.com [infra] Merge SwiftShader into CPU dimensions logic
2020-02-18 scroggo@google.com Enable Windows host build for Skia
2020-02-18 yiyix@chromium.org Update SkSurface::ReplaceBackendTexture to take ContentChangeMode

Created with:
  gclient setdep -r src/third_party/skia@3c4a9d347da1

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 lovisolo@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
Bug: chromium:1014246
Tbr: lovisolo@google.com
Change-Id: I1b5f61cca0441b4af9f77403998d55819e99d114
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2062468Reviewed-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@{#742197}

DEPS

@@ -171,7 +171,7 @@ 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': 'c1bb9cba16beac18a2e7a91db3482bac9a9ff52c',
+  'skia_revision': '3c4a9d347da164a3d30aadbda7076697953175a0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.