Roll third_party/externals/angle2 f1b2c4b..e9dc020 (7 commits)

https://chromium.googlesource.com/angle/angle.git/+log/f1b2c4bed48a..e9dc0201af3a

git log f1b2c4b..e9dc020 --date=short --first-parent --format='%ad %ae %s'
2020-02-06 brianosman@google.com GL: Mark unused uniform locations that were explicitly bound as ignored
2020-02-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/glslang/src b82ed734e767..656650f461c8 (1 commits)
2020-02-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/spirv-tools/src 9e52bc0d0c1d..1f03ac10270a (1 commits)
2020-02-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-validation-layers/src ab47cacfd3b3..b60b35843e66 (6 commits)
2020-02-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/vulkan-tools/src 260679605f98..428455ca6121 (2 commits)
2020-02-06 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader 8e8e1d0dd729..dd48b7e2d06e (2 commits)
2020-02-06 syoussefi@chromium.org Vulkan: Compile shaders at link time

Created with:
  gclient setdep -r third_party/externals/angle2@e9dc0201af3a

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/angle-skia-autoroll
Please CC scroggo@google.com,brianosman@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: skia/skia.primary:Build-Debian9-Clang-x86_64-Release-ANGLE;skia/skia.primary:Test-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE;skia/skia.primary:Test-Win10-Clang-Golo-GPU-QuadroP400-x86_64-Debug-All-ANGLE;skia/skia.primary:Test-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE;skia/skia.primary:Test-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE;skia/skia.primary:Test-Win10-Clang-NUC8i5BEK-GPU-IntelIris655-x86_64-Debug-All-ANGLE;skia/skia.primary:Test-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE
Bug: None
Tbr: scroggo@google.com,brianosman@google.com
Change-Id: Ic90bbb2cdf0beed9f40d093a828c1db37502d865
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/269124
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>

Author: skia-autoroll

DEPS

@@ -7,7 +7,7 @@ vars = {
 deps = {
   "buildtools"                            : "https://chromium.googlesource.com/chromium/buildtools.git@505de88083136eefd056e5ee4ca0f01fe9b33de8",
   "common"                                : "https://skia.googlesource.com/common.git@9737551d7a52c3db3262db5856e6bcd62c462b92",
-  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@f1b2c4bed48ad964693480ac4850d39b05ff4044",
+  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@e9dc0201af3af167d21bc0f26bc763e18e82f994",
   "third_party/externals/dawn"            : "https://dawn.googlesource.com/dawn.git@604072bc2ed01018eb03bcbbf9d94042f679af63",
   "third_party/externals/dng_sdk"         : "https://android.googlesource.com/platform/external/dng_sdk.git@c8d0c9b1d16bfda56f15165d39e0ffa360a11123",
   "third_party/externals/egl-registry"    : "https://skia.googlesource.com/external/github.com/KhronosGroup/EGL-Registry@a0bca08de07c7d7651047bedc0b653cfaaa4f2ae",