Roll src/third_party/skia/ 9f553932a..12b69eede (3 commits)

https://skia.googlesource.com/skia.git/+log/9f553932a4a4..12b69eedeed5

$ git log 9f553932a..12b69eede --date=short --no-merges --format='%ad %ae %s'
2017-11-20 ethannicholas shader cache now ignores shaders with a length of 0
2017-11-14 ethannicholas Fix shader initialization on a cache hit
2017-11-28 jvanverth Add create_bundle support for GN

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=allanmac@chromium.org

Change-Id: I64a40bba4b6d805993bccce82205711700d29f4c
Reviewed-on: https://chromium-review.googlesource.com/794057Reviewed-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@{#519750}

DEPS

@@ -74,7 +74,7 @@ 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': '9f553932a4a4e986db323d8f4da2f78d9a729254',
+  'skia_revision': '12b69eedeed5c280e2b046ccbcf2c25f30fde536',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.