Roll src/third_party/shaderc/src 3f24b6829b3e..dc2172c083f6 (1 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/3f24b6829b3e..dc2172c083f6

git log 3f24b6829b3e..dc2172c083f6 --date=short --first-parent --format='%ad %ae %s'
2020-01-10 rharrison@google.com Implement Reflection API needed by Dawn (#950)

Created with:
  gclient setdep -r src/third_party/shaderc/src@dc2172c083f6

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

Bug: None
Tbr: radial-bots+chrome-roll@google.com
Change-Id: Ib99e012ff45a0edf101cb44ed42878caf8a5e9ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1995586Reviewed-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@{#730296}

DEPS

@@ -308,7 +308,7 @@ 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': '3f24b6829b3e7da9c97b779402311ece81264ca8',
+  'shaderc_revision': 'dc2172c083f6ac0ba8c1c609d64a2edd0fa8b81b',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.