Roll src/third_party/angle 8ba50490174a..6950a87f9054 (4 commits)

https://chromium.googlesource.com/angle/angle.git/+log/8ba50490174a..6950a87f9054

git log 8ba50490174a..6950a87f9054 --date=short --no-merges --format='%ad %ae %s'
2019-10-11 sergeyu@google.com [Fuchsia] Exclude libvk_swiftshader.so on Fuchsia
2019-10-11 timvp@google.com Vulkan: Prevent Creating ES 3.0 Context if Min. Caps. Not Met
2019-10-11 jie.a.chen@intel.com Fix the missing global memory barriers
2019-10-11 m.maiya@samsung.com Vulkan: Enable GL_OES_EGL_image_external_essl3

Created with:
  gclient setdep -r src/third_party/angle@6950a87f9054

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 geofflang@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=geofflang@google.com

Bug: None
Change-Id: I535753ef5e55648b3a6b359f6312e591b76ddf39
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1855121Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704991}

DEPS

@@ -179,7 +179,7 @@ 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': '8ba50490174a3bc39f990c25a809d1891f975f9b',
+  'angle_revision': '6950a87f905453f8626aa6932463fb9be6528628',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.

fuchsia/engine/BUILD.gn

@@ -207,8 +207,6 @@ fuchsia_package("web_engine") {
     "lib/libEGL.so",
     "lib/libGLESv2.so",
     "lib/libfuchsia_egl.so",
-    "lib/libvk_swiftshader.so",
-    "swiftshader/libvk_swiftshader_icd.json",
   ]
 }