Roll src/third_party/skia/ 5226b777e..76c01c930 (3 commits; 1 trivial rolls)

https://skia.googlesource.com/skia.git/+log/5226b777edee..76c01c930ca4

$ git log 5226b777e..76c01c930 --date=short --no-merges --format='%ad %ae %s'
2018-05-04 angle-skia-autoroll Roll third_party/externals/angle2/ 03bb2231a..d7b56642c (2 commits)
2018-05-03 anmittal Fix skia compilation error

Created with:
  roll-dep src/third_party/skia


The AutoRoll server is located here: https://autoroll.skia.org

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=master.tryserver.blink:linux_trusty_blink_rel;luci.chromium.try:android_optional_gpu_tests_rel;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=brianosman@chromium.org

Change-Id: Ia254f548f5e6af0f6d2085d6999ffea432794b01
Reviewed-on: https://chromium-review.googlesource.com/1044228Reviewed-by: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#556045}

DEPS

@@ -96,7 +96,7 @@ 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': '5226b777edeef1b8168c9cf7f4fb34a0fdc606a1',
+  'skia_revision': '76c01c930ca4bea2fbfc78e1113ac2fd465f4129',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.