Roll src/third_party/swiftshader 204a410c8c40..f63c4e51101a (2 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/204a410c8c40..f63c4e51101a

git log 204a410c8c40..f63c4e51101a --date=short --no-merges --format='%ad %ae %s'
2019-08-01 bclayton@google.com Reactor: Don't auto-initialize Pointer<T> variables with null.
2019-08-01 bclayton@google.com Reactor: Add nullptr_t copy / assignment operators to Pointer<T>

Created with:
  gclient setdep -r src/third_party/swiftshader@f63c4e51101a

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: I51f77af807365c89ba77b30b32ac2e0428610af7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1730741Reviewed-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@{#683217}

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': '204a410c8c4061ffdf93587081680dab8c1437a3',
+  'swiftshader_revision': 'f63c4e51101a33fbaeaaafba949830ad43f39055',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.