Roll ANGLE from 7598f4b003ea to 48df087f8a86 (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/7598f4b003ea..48df087f8a86

2020-09-09 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from 10121443c16d to ce08265ba5b7 (3 revisions)
2020-09-09 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SPIRV-Tools from 1ab52e54abfd to a715b1b40535 (2 revisions)
2020-09-09 syoussefi@chromium.org Vulkan: Free 8 bits in RenderPassDesc

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 ianelliott@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/+doc/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;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Bug: None
Tbr: ianelliott@google.com
Change-Id: I6492177b62fb30bc171ad4a70c1156cc3479577d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2400274Reviewed-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@{#805292}

DEPS

@@ -207,7 +207,7 @@ 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': '7598f4b003eae1f95efb073d2bdcab4bbde9f261',
+  'angle_revision': '48df087f8a86cb68c494875c04d08b7f32171986',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.