Roll src/third_party/skia/ f9aa9e516..b8ab7f763 (3 commits)

https://skia.googlesource.com/skia.git/+log/f9aa9e51691d..b8ab7f7634fc

$ git log f9aa9e516..b8ab7f763 --date=short --no-merges --format='%ad %ae %s'
2017-04-10 borenet Fix BundleRecipes depending on Release-Shared build
2017-04-10 herb Add multi-stop SkJumper stage.
2017-04-10 bsalomon Move ref counting out of GrProcessor and into subclasses.

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=mtklein@chromium.org

Change-Id: I097954c955bc68e5c33c914740ee043638b16df5
Reviewed-on: https://chromium-review.googlesource.com/472927Reviewed-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@{#463299}

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': 'f9aa9e51691d83970039f42c623c1fd354552378',
+  'skia_revision': 'b8ab7f7634fc986962fdcdb70c7037a9d5b2ca9c',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.