Roll ANGLE from e95e2c3c48a4 to 1a455f4e54b0 (6 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/e95e2c3c48a4..1a455f4e54b0

2020-06-15 m.maiya@samsung.com Vulkan: Set external image's usage flags based on AHB usage flags
2020-06-15 shrekshao@google.com Fix baseVertex and baseInstance with streaming attributes
2020-06-15 angle-autoroll@skia-public.iam.gserviceaccount.com Roll VK-GL-CTS from a60f89ffcba2 to bfa95c7ad8b7 (7 revisions)
2020-06-15 geofflang@chromium.org Revert "Remove redundant BlendStateArray tracking"
2020-06-15 geofflang@chromium.org Don't expose pixmap support from DisplayEGL.
2020-06-15 m.maiya@samsung.com Vulkan: Addition of ImageRespecificationTest

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 courtneygo@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: chromium:1078330,chromium:1085996,chromium:1094634
Tbr: courtneygo@google.com
Test: Test: angle_end2end_tests.exe --gtest_filter=ImageRespecificationTest*
Change-Id: I8e7d0dbe7d9b8efb6c378ab3def4441d515b0161
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2247040Reviewed-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@{#778574}

DEPS

@@ -194,7 +194,7 @@ 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': 'e95e2c3c48a45001f390aa942a52dd539fb7d207',
+  'angle_revision': '1a455f4e54b0638808724191e3a6394cf75a7cb6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.