Roll src/third_party/skia/ 25af671a3..6b043cb9c (10 commits)

https://skia.googlesource.com/skia.git/+log/25af671a3d7d..6b043cb9cc1a

$ git log 25af671a3..6b043cb9c --date=short --no-merges --format='%ad %ae %s'
2018-04-26 angle-skia-autoroll Roll third_party/externals/angle2/ f827123d9..197d52949 (2 commits)
2018-04-25 fmalita [skottie] Add support for inverse mask paths
2018-04-25 swiftshader-skia-autoroll Roll third_party/externals/swiftshader/ c8eedebdf..840f47ea8 (5 commits)
2018-04-25 enne Fix GrAAConvexTessellator trying to fan a 0 point ring
2018-04-25 bsalomon Reland "Revert "Add arcs as a specialized geometry to GrShape.""
2018-04-25 liyuqian Remove SkASSERT(fConvexity == kUnknown_Convexity) due to racing
2018-04-25 bsalomon Make SkString::appendf safe for long strings.
2018-04-25 skcms-skia-autoroll Roll skia/third_party/skcms 2c9b55f..ba9fcb3 (1 commits)
2018-04-25 reed fix android-framework
2018-04-25 csmartdalton Remove the MSAA path renderer

Created with:
  roll-dep src/third_party/skia
BUG=chromium:830038


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=stani@chromium.org

Change-Id: I027b96e1a3a856ef003b64a2fbc01864671fea9b
Reviewed-on: https://chromium-review.googlesource.com/1029611Reviewed-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@{#553921}

DEPS

@@ -90,7 +90,7 @@ 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': '25af671a3d7d790b31b085172952df3867337431',
+  'skia_revision': '6b043cb9cc1a45a9277d40c9f37b8021b77389b6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.