Roll skia/third_party/externals/angle2/ 1c08cbb39..dfebe9b2d (4 commits)

https://chromium.googlesource.com/angle/angle.git/+log/1c08cbb398cd..dfebe9b2d5d9

$ git log 1c08cbb39..dfebe9b2d --date=short --no-merges --format='%ad %ae %s'
2018-03-14 jmadill D3D11: Add dirty bits for Transform Feedback.
2018-03-14 jmadill Vulkan: Enable SimpleVertexShader.
2018-03-16 jmadill Vulkan: Implement depth range correction.
2018-03-14 jmadill Remove HasIndexRange.

Created with:
  roll-dep skia/third_party/externals/angle2


The AutoRoll server is located here: https://angle-skia-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


CQ_INCLUDE_TRYBOTS=skia.primary:Perf-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE,Perf-Win10-Clang-ShuttleC-GPU-GTX960-x86_64-Debug-All-ANGLE,Test-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE,Test-Win10-Clang-NUC6i5SYK-GPU-IntelIris540-x86_64-Debug-All-ANGLE,Test-Win10-Clang-NUCD34010WYKH-GPU-IntelHD4400-x86_64-Debug-All-ANGLE,Test-Win10-Clang-ShuttleC-GPU-GTX960-x86_64-Debug-All-ANGLE,Build-Debian9-Clang-x86_64-Release-ANGLE
TBR=stephana@google.com

Change-Id: I896a161b718b1fcf79729bcf513e60c8a3ea330f
Reviewed-on: https://skia-review.googlesource.com/114880
Reviewed-by: <angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: <angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 7cba084..63698220 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
 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@1c08cbb398cd7440e21f47733c9cf304bc3817c6",
+  "third_party/externals/angle2"        : "https://chromium.googlesource.com/angle/angle.git@dfebe9b2d5d9b02d6c6d026ba5add51556c49b4d",
   "third_party/externals/dng_sdk"       : "https://android.googlesource.com/platform/external/dng_sdk.git@96443b262250c390b0caefbf3eed8463ba35ecae",
   "third_party/externals/expat"         : "https://android.googlesource.com/platform/external/expat.git@android-6.0.1_r55",
   "third_party/externals/freetype"      : "https://skia.googlesource.com/third_party/freetype2.git@447a0b62634802d8acdb56008cff5ff4e50be244",