Roll src/third_party/angle 55de83afeec7..51fd2958f9a2 (1 commits)

https://chromium.googlesource.com/angle/angle.git/+log/55de83afeec7..51fd2958f9a2

git log 55de83afeec7..51fd2958f9a2 --date=short --first-parent --format='%ad %ae %s'
2020-02-07 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/spirv-tools/src 1f03ac10270a..fe10239f92f4 (1 commits)

Created with:
  gclient setdep -r src/third_party/angle@51fd2958f9a2

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/angle-chromium-autoroll
Please CC cnorthrop@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_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win-asan;luci.chromium.try:win_optional_gpu_tests_rel
Bug: None
Tbr: cnorthrop@google.com
Change-Id: I4ea5583552a0eb17a23b1cb100db2638999dadf7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2043400Reviewed-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@{#739358}

DEPS

@@ -183,7 +183,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
-  'angle_revision': '55de83afeec71a315192e2aa407c604089000beb',
+  'angle_revision': '51fd2958f9a27a70107ffbd2aec25c97c6daf1f1',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.