Roll src/third_party/SPIRV-Tools/src 3855447d93eb..c9190a54da56 (3 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/3855447d93eb..c9190a54da56


git log 3855447d93eb..c9190a54da56 --date=short --no-merges --format='%ad %ae %s'
2019-07-23 stevenperron@google.com SSA rewriter: Don't use trivial phis (#2757)
2019-07-23 alanbaker@google.com Fix block depth rule priority (#2755)
2019-07-23 alanbaker@google.com Case validation with repeated labels (#2689)


Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@c9190a54da56

The AutoRoll server is located here: https://autoroll.skia.org/r/spirv-tools-chromium-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

CQ_INCLUDE_TRYBOTS=luci.chromium.try:android_angle_vk32_deqp_rel_ng;luci.chromium.try:android_angle_vk32_rel_ng;luci.chromium.try:android_angle_vk64_deqp_rel_ng;luci.chromium.try:android_angle_vk64_rel_ng;luci.chromium.try:linux_angle_deqp_rel_ng;luci.chromium.try:linux-angle-rel;luci.chromium.try:win-angle-rel;luci.chromium.try:win_angle_deqp_rel_ng

TBR=radial-bots+chrome-roll@google.com,jmadill@chromium.org,jmadill@google.com

Bug: None
Change-Id: Idf93d418d9f1926772194679e082c093edde3d80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1716591Reviewed-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@{#680386}

DEPS

@@ -263,7 +263,7 @@ 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.
-  'spv_tools_revision': '3855447d93eb9a79723e0711b895b57ae444ce3f',
+  'spv_tools_revision': 'c9190a54da56e425d09e122368b18bcfe00dabf6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.