Roll src/third_party/skia/ 1c8bb8a4c..d425a1d01 (14 commits)

https://skia.googlesource.com/skia.git/+log/1c8bb8a4c63c..d425a1d013b6

$ git log 1c8bb8a4c..d425a1d01 --date=short --no-merges --format='%ad %ae %s'
2017-07-12 halcanary SkPDF:  start to support AlphaOnly Images as masks.
2017-07-12 egdaniel Add arc support to gpu Obj c++ code
2017-07-12 halcanary SkPDF: simplify drawImage/Bitmap/Sprite code.
2017-07-12 fmalita Add some raster pipeline perspective asserts
2017-07-12 herb Experimental blur code with 32 bit fix.
2017-07-12 brianosman On Windows, always re-create window for GL or Vulkan
2017-07-12 brianosman Move expensive initialization to onOnceBeforeDraw
2017-07-12 bsalomon Revert "Revert "Make DashOp a non-legacy GrMeshDrawOp.""
2017-07-12 reed remove references to kIndex_8_SkColorType from our tools/tests
2017-07-12 liyuqian Implement Sk4i's abs, min, max
2017-07-12 brianosman Extend final point in closed degenerate hairline segments
2017-07-12 bsalomon Fix assert in lattice op triggered by GLProgramsTest
2017-07-12 fmalita Clarify adjustMatrixAndAppendStages semantics
2017-07-12 bsalomon Revert "Make DashOp a non-legacy GrMeshDrawOp."

Created with:
  roll-dep src/third_party/skia


Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=ethannicholas@chromium.org

Change-Id: I832b49480e40cf659d748c618f7d2ee687a4bc0c
Reviewed-on: https://chromium-review.googlesource.com/569010Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486199}

DEPS

@@ -40,7 +40,7 @@ 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': '1c8bb8a4c63c327fb856a41e1b0b19775eac0ac1',
+  'skia_revision': 'd425a1d013b669b6be375e99ad0c0703261e5bb6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.