Roll src/third_party/swiftshader 8d269bac7c4a..b51a6f0c4638 (3 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/8d269bac7c4a..b51a6f0c4638


git log 8d269bac7c4a..b51a6f0c4638 --date=short --no-merges --format='%ad %ae %s'
2019-07-29 bclayton@google.com Revert "Temporarily disable warnings-as-errors"
2019-07-29 bclayton@google.com Merge changes I10d66439,I6bd62e7b,Iec85e0df,If16c5d11,If803398e, ...
2019-07-29 bclayton@google.com LLVMReactor: Build fixes for REACTOR_EMIT_DEBUG_INFO


Created with:
  gclient setdep -r src/third_party/swiftshader@b51a6f0c4638

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

TBR=swiftshader-team+autoroll@google.com

Bug: None
Change-Id: I50bb0719e5bab6d777966140d28669868ac2faa6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1724574Reviewed-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@{#681874}

DEPS

@@ -161,7 +161,7 @@ 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': '8d269bac7c4acd92afa9bc481d521627febbb0ad',
+  'swiftshader_revision': 'b51a6f0c4638c28f4879399cb9e2c83e7667f154',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.