Roll third_party/externals/angle2 5f4db6a76640..51b5a3222b60 (9 commits)

https://chromium.googlesource.com/angle/angle.git/+log/5f4db6a76640..51b5a3222b60

git log 5f4db6a76640..51b5a3222b60 --date=short --no-merges --format='%ad %ae %s'
2019-11-15 tobine@google.com Update dEQP 3.1 expectations
2019-11-15 jonahr@google.com Expose EGL_CHROMIUM_sync_control via GLX_OML_sync_control
2019-11-15 timvp@google.com Vulkan: Update Expectations with GLES 3.1 Conformance Failures
2019-11-15 lehoangq@gmail.com Enable Metal backend.
2019-11-15 timvp@google.com Update GLES31 Expectations
2019-11-15 jonahr@google.com Add a test to capture bug with LUMA blit workaround
2019-11-15 jiawei.shao@intel.com Add android_ndk and catapult to .gitignore
2019-11-15 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/spirv-tools/src 3da910d55f20..c3f22f7cba60 (2 commits)
2019-11-15 angle-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/SwiftShader b2407dd746de..102fd19c65f4 (4 commits)

Created with:
  gclient setdep -r third_party/externals/angle2@51b5a3222b60

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 robertphillips@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.primary:Build-Debian9-Clang-x86_64-Release-ANGLE;skia.primary:Test-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-Golo-GPU-QuadroP400-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUC8i5BEK-GPU-IntelIris655-x86_64-Debug-All-ANGLE;skia.primary:Test-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE
Bug: None
TBR=robertphillips@google.com
Change-Id: I51249a8fe5b3a28cba2f63d0efcf68c858a2fd42
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255056
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index f410567..229d90a 100644
--- a/DEPS
+++ b/DEPS
@@ -7,7 +7,7 @@
 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@5f4db6a76640134ef267241e6d11006101a4f7e5",
+  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@51b5a3222b60d5f523d04b5a86eeb28278880db4",
   "third_party/externals/dawn"            : "https://dawn.googlesource.com/dawn.git@3c086a0c2e1dc3e2e14aaa3d78c052c7e07274b4",
   "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",