Roll src/third_party/shaderc/src ff260580c07e..6807a2568cda (1 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/ff260580c07e..6807a2568cda

git log ff260580c07e..6807a2568cda --date=short --first-parent --format='%ad %ae %s'
2019-11-26 rharrison@google.com Rolling 5 dependencies (#908)

Created with:
  gclient setdep -r src/third_party/shaderc/src@6807a2568cda

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: I6b00cd5a0d92c8e32d1dd376bc6a5a742bae154f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1936950Reviewed-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@{#719179}

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': 'ff260580c07e8f9eae471b3d02dd2fe589c73198',
+  'shaderc_revision': '6807a2568cdaebd55194df61c2859adc0fcfe437',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.