Roll src/third_party/shaderc/src 711a2b75fb81..4bb7b1ddf3b1 (1 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/711a2b75fb81..4bb7b1ddf3b1

git log 711a2b75fb81..4bb7b1ddf3b1 --date=short --first-parent --format='%ad %ae %s'
2020-01-14 rharrison@google.com Convert spvc messages internal struct to be a vector (#952)

Created with:
  gclient setdep -r src/third_party/shaderc/src@4bb7b1ddf3b1

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: I743d19aeadc48757a4a94af66511087d56934fbc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2001437Reviewed-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@{#731670}

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': '711a2b75fb81d35b87da5bd0a115f6a654bb4d4c',
+  'shaderc_revision': '4bb7b1ddf3b12aa3ad80fa63ccf4afe87e0e6987',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.