Roll src/third_party/shaderc/src 1926de0638b6..a10a0b33493e (2 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/1926de0638b6..a10a0b33493e

git log 1926de0638b6..a10a0b33493e --date=short --first-parent --format='%ad %ae %s'
2020-04-14 rharrison@google.com Add warning signs about unsupported downloads (#1041)
2020-04-14 rharrison@google.com Rolling 5 dependencies and updating expectations (#1044)

Created with:
  gclient setdep -r src/third_party/shaderc/src@a10a0b33493e

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: Ia78ae597b9c7fd48aab6d93916a276f4b3b5e2a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2149607Reviewed-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@{#758987}

DEPS

@@ -298,7 +298,7 @@ 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': '1926de0638b6dd74b759293a5bd21c473d0b1ade',
+  'shaderc_revision': 'a10a0b33493e3ff1c0de1dc8406ed8de230ba8c1',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.