Roll src/third_party/shaderc/src 091a11f81dce..6dadd812f4d9 (1 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/091a11f81dce..6dadd812f4d9

git log 091a11f81dce..6dadd812f4d9 --date=short --no-merges --format='%ad %ae %s'
2019-11-21 9856269+sarahM0@users.noreply.github.com Add spvc parser support for OpGroupDecorate, OpGroupMemberGecorate, OpDecorateStringGOOGLE, and OpMemberDecorateStringGOOGLE (#899)

Created with:
  gclient setdep -r src/third_party/shaderc/src@6dadd812f4d9

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: I6b74b378e84e76bba42a5b5dc53a3d6401f19599
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1928146Reviewed-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@{#717698}

DEPS

@@ -299,7 +299,7 @@ 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': '091a11f81dce59f126c4b5ef4da8f034e1d8bf8e',
+  'shaderc_revision': '6dadd812f4d98d09a5491e35514a56da8aad442d',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.