Roll src/third_party/skia/ 7d3d87233..4e3abc1ad (12 commits)

https://skia.googlesource.com/skia.git/+log/7d3d87233190..4e3abc1ad5f0

$ git log 7d3d87233..4e3abc1ad --date=short --no-merges --format='%ad %ae %s'
2017-04-07 reed cacherator upscales colortables to unify caching
2017-04-03 halcanary SkMultiPictureDocument : clean up MultiPictureDocumentReader interface
2017-04-07 robertphillips Make GrCopySurfaceOp friendlier to GrSurfaceProxy (take 2)
2017-04-07 scroggo Simplify subset computation in SkGifImageReader
2017-04-06 mtklein stop disabling threadsafe statics
2017-04-07 borenet Fix missing valgrind.supp in recipe-bundled tasks
2017-04-07 kjlubick Add ChromeOS Test/Perf jobs and recipe changes
2017-04-06 halcanary SkTypeface_win_dw: populate_glyph_to_unicode uses lowest unichar
2017-04-06 mtklein simplify SkRRect serialization
2017-04-06 mtklein Try disabling MSAN workarounds in SkJpegCodec
2017-04-07 borenet Reland: Use bundled recipes for all test/perf tasks
2017-04-06 mtklein jumper, gather_f16

Created with:
  roll-dep src/third_party/skia
BUG=538133


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=jvanverth@chromium.org

Change-Id: I31295c32b1fde854b28bc400f41c82c3c9bfe307
Reviewed-on: https://chromium-review.googlesource.com/471049Reviewed-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@{#462950}

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': '7d3d8723319038d16456137ba932f238c1e65dbf',
+  'skia_revision': '4e3abc1ad5f078ed55cbc0c0ef0e14062a39bd13',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.