Roll ANGLE from 9184973fc1be to 68c0da839bc6 (13 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/9184973fc1be..68c0da839bc6

2021-09-22 timvp@google.com Vulkan: Inform frontend when new buffer is allocated
2021-09-22 timvp@google.com Vulkan: glMapBuffer(): Create new buffer (Buffer Ghosting)
2021-09-22 timvp@google.com Vulkan: Add ResourceWrite to track Read and Write Access
2021-09-21 jmadill@chromium.org Vulkan: Lift DS feedback read-only suppression.
2021-09-21 kpiddington@apple.com Metal: ANGLE Metal AutoObjCPtr == nullptr comparison is inverted
2021-09-21 kpiddington@apple.com Reimplement transform feedback on direct-to-Metal backend
2021-09-21 yuxinhu@google.com Fix app trace heap buffer overflow
2021-09-21 jmadill@chromium.org GN: Remove the "no GTest" dEQP targets.
2021-09-21 kpiddington@apple.com Metal Direct: TinyDepthStencilWorkaroundTest.DepthTexturesStick
2021-09-21 jmadill@chromium.org Fix build in some configurations.
2021-09-21 jmadill@chromium.org Perf Tests: Split samples into sub-tests on desktop.
2021-09-21 angle-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from b7de6caa43b9 to 6cbc24686901 (7 revisions)
2021-09-21 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Chromium from e515fa6a510e to 0537997114eb (434 revisions)

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 brianosman@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in ANGLE: https://bugs.chromium.org/p/angleproject/issues/entry
To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry

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/main/autoroll/README.md

Cq-Include-Trybots: skia/skia.primary:Build-Debian10-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
Tbr: brianosman@google.com
Test: Test: BufferDataTest.MapWriteArrayBufferDataDrawArrays
Test: Test: BufferDataTest.MapWriteArrayBufferDataDrawQuad
Test: Test: ComputeShaderTest.ImageBufferMapWrite
Test: Test: TextureBufferTestES31.MapTextureBufferInvalidateThenWrite
Test: Test: VulkanPerformanceCounterTest.MappingGpuReadOnlyBufferGhostsBuffer
Change-Id: I1ecaef225b0e0c62167d20f833d6e58305636358
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/451438
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index cd75694..960f03e 100644
--- a/DEPS
+++ b/DEPS
@@ -11,7 +11,7 @@
 
 deps = {
   "buildtools"                            : "https://chromium.googlesource.com/chromium/buildtools.git@505de88083136eefd056e5ee4ca0f01fe9b33de8",
-  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@9184973fc1bea024dc564a45ad2b864ebc46d842",
+  "third_party/externals/angle2"          : "https://chromium.googlesource.com/angle/angle.git@68c0da839bc6c381284108da9553a6b7fc4b0c79",
   "third_party/externals/brotli"          : "https://skia.googlesource.com/external/github.com/google/brotli.git@e61745a6b7add50d380cfd7d3883dd6c62fc2c71",
   "third_party/externals/d3d12allocator"  : "https://skia.googlesource.com/external/github.com/GPUOpen-LibrariesAndSDKs/D3D12MemoryAllocator.git@169895d529dfce00390a20e69c2f516066fe7a3b",
   # Dawn requires jinja2 and markupsafe for the code generator, and tint for SPIRV compilation.