Roll src/third_party/swiftshader 83ca1b9af5cc..aba1020d3914 (5 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/83ca1b9af5cc..aba1020d3914

git log 83ca1b9af5cc..aba1020d3914 --date=short --no-merges --format='%ad %ae %s'
2019-11-15 bclayton@google.com Remove the now unused sw::Event.
2019-11-15 bclayton@google.com VkQueryPool: Migrate from sw sync to marl
2019-11-15 bclayton@google.com VkDevice: Migrate to using marl::Event::any()
2019-11-15 bclayton@google.com VkFence: Migrate to marl::Event
2019-11-15 bclayton@google.com Merge changes Ifb21caa2,Iaca5897d

Created with:
  gclient setdep -r src/third_party/swiftshader@aba1020d3914

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-chromium-autoroll
Please CC swiftshader-team+autoroll@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

CQ_INCLUDE_TRYBOTS=luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_chromium_msan_rel_ng;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: chromium:b/140546382,chromium:b/140546382,chromium:b/144388391,chromium:b/144388391
Change-Id: I06e4475a1a5a751fa68d78ee73af61fccbf20b8a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1919779Reviewed-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@{#715913}

DEPS

@@ -188,7 +188,7 @@ 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': '83ca1b9af5cc03e57072ef301a9c719963b92ce9',
+  'swiftshader_revision': 'aba1020d39145285f8d8df82d6f0b83d0b0e5386',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.