Roll src/third_party/shaderc/src c5a91bb269fc..8ba3dcbde46b (1 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/c5a91bb269fc..8ba3dcbde46b

git log c5a91bb269fc..8ba3dcbde46b --date=short --no-merges --format='%ad %ae %s'
2019-08-27 zoddicus@users.noreply.github.com Rolling 7 dependencies and updating known_failures (#791)

Created with:
  gclient setdep -r src/third_party/shaderc/src@8ba3dcbde46b

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/shaderc-chromium-autoroll
Please CC radial-bots+chrome-roll@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

TBR=radial-bots+chrome-roll@google.com

Bug: None
Change-Id: Ib15a774c6947beb8490cdc85db0d7496bbb0a098
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1773195Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#690892}

DEPS

@@ -293,7 +293,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'shaderc_revision': 'c5a91bb269fc3fe250e608df5c7713206ceef3c2',
+  'shaderc_revision': '8ba3dcbde46b1f29f94ebdb7b2bf33abe9690536',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.