Roll src/third_party/angle 9ec5c78a9256..d4b3120e6071 (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/9ec5c78a9256..d4b3120e6071

git log 9ec5c78a9256..d4b3120e6071 --date=short --no-merges --format='%ad %ae %s'
2019-11-13 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/spirv-tools/src 12e54dae167c..ab3cdcaef56e (2 commits)
2019-11-13 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/glslang/src f34cdc70ca1b..37dcb894574e (1 commits)

Created with:
  gclient setdep -r src/third_party/angle@d4b3120e6071

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_optional_gpu_tests_rel
TBR=cnorthrop@google.com

Bug: chromium:None,chromium:None
Change-Id: I5e61ee00c7fe2b50956896012c67ed4b8772b141
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1914281Reviewed-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@{#714904}

DEPS

@@ -180,7 +180,7 @@ 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': '9ec5c78a9256b381d3e78ce89044f5d309b630a4',
+  'angle_revision': 'd4b3120e60715131392d5e35c28df15a2b3efcb7',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.