Roll src/third_party/swiftshader cd3e11d9464a..b72d28ff9975 (4 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/cd3e11d9464a..b72d28ff9975


git log cd3e11d9464a..b72d28ff9975 --date=short --no-merges --format='%ad %ae %s'
2019-03-11 capn@google.com Add reactor unit tests to Kokoro
2019-03-11 capn@google.com Refactor emulated vector type handling for LLVM
2019-03-11 bclayton@google.com SpirvShader: Implement SMod.
2019-03-11 bclayton@google.com Add test/regres/export_to_sheets.go


Created with:
  gclient setdep -r src/third_party/swiftshader@b72d28ff9975

The AutoRoll server is located here: https://autoroll.skia.org/r/swiftshader-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_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel

BUG=chromium:b/126873455
TBR=swiftshader-team+autoroll@chromium.org

Change-Id: I1ffa39f665bcf5ba9bf82dcd775bfd64ff42c09f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1515176
Reviewed-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@{#639543}

DEPS

@@ -149,7 +149,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.
-  'swiftshader_revision': 'cd3e11d9464a6051420ea167cbb517294eb3bab6',
+  'swiftshader_revision': 'b72d28ff997537d92522ab24d1185dca763cf25e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.