Revert "Roll src/third_party/skia 29c1c8029a52..1f4c2bdfa2c1 (7 commits)"

This reverts commit afbb99bf.

Reason for revert: will break build

Original change's description:
> Roll src/third_party/skia 29c1c8029a52..1f4c2bdfa2c1 (7 commits)
> 
> https://skia.googlesource.com/skia.git/+log/29c1c8029a52..1f4c2bdfa2c1
> 
> 
> git log 29c1c8029a52..1f4c2bdfa2c1 --date=short --no-merges --format='%ad %ae %s'
> 2019-04-23 mtklein@google.com sort, dedup skia_public_includes
> 2019-04-23 mtklein@google.com inject SkUserConfig.h with -DSK_USER_CONFIG_HEADER
> 2019-04-23 mtklein@google.com another stray <include> -> ""
> 2019-04-23 ethannicholas@google.com added support for interpreting generic SkSL functions
> 2019-04-23 mtklein@google.com are these include paths no longer needed?
> 2019-04-23 herb@google.com Only call findImage when needed
> 2019-04-23 mtklein@google.com switch some idiosyncratic <includes> to ""
> 
> 
> Created with:
>   gclient setdep -r src/third_party/skia@1f4c2bdfa2c1
> 
> The AutoRoll server is located here: https://autoroll.skia.org/r/skia-autoroll
> 
> Documentation for the AutoRoller is here:
> https://skia.googlesource.com/buildbot/+/master/autoroll/README.md
> 
> If the roll is causing failures, please contact the current sheriff, who should
> be CC'd on the roll, and stop the roller if necessary.
> 
> 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=mtklein@chromium.org
> 
> Change-Id: I6df4435268acbb8ddba0121ee6c397c85c95d284
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1577574
> Reviewed-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@{#653382}

TBR=mtklein@chromium.org,chromium-autoroll@skia-public.iam.gserviceaccount.com

Change-Id: Ic2144340f24989ffc2b05b0523fcd1dfb3827e94
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
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
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1580044Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653384}

DEPS

@@ -129,7 +129,7 @@ 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': '1f4c2bdfa2c112b6eb1b04dcfc3ab831dcd7fbbd',
+  'skia_revision': '29c1c8029a52f95250180b58f13c639dd6c59b39',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.