Roll src/third_party/skia/ 947326638..689d02d4b (5 commits)

https://skia.googlesource.com/skia.git/+log/947326638a25..689d02d4b480

$ git log 947326638..689d02d4b --date=short --no-merges --format='%ad %ae %s'
2018-03-09 caryclark harden pathmeasure and fix empty case
2018-03-09 fmalita Extend SkTrimPathEffect semantics
2018-03-09 reed remove unused ConvertRadiusToSigma from SkBlurMaskFilter
2018-03-12 borenet Fix binary size analysis
2018-03-12 caryclark fail on mdout 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;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
TBR=stephana@chromium.org

Change-Id: I4223618e68c8ba6cd24f83bbaaf3da087e3c5c18
Reviewed-on: https://chromium-review.googlesource.com/959043
Commit-Queue: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#542500}

DEPS

@@ -79,7 +79,7 @@ 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': '947326638a25d321981cc6f7ec0bf992273b884b',
+  'skia_revision': '689d02d4b480289aacaeb2da83b93d733cdfcb0f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.