Roll ANGLE c5af8ba..4cff8d6

https://chromium.googlesource.com/angle/angle.git/+log/c5af8ba..4cff8d6

BUG=

TBR=cwallez@chromium.org

TEST=bots

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Change-Id: I6d79c2fab74d84d4fc66d14ab2ccfb4df4a193b7
Reviewed-on: https://chromium-review.googlesource.com/574633Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487163}

DEPS

@@ -52,7 +52,7 @@ 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': 'c5af8ba6ebd2246b4c214f30bd50ba80fa8b1e3e',
+  'angle_revision': '4cff8d625ce5e187ac81cac0f892daaeab68ff7e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling build tools
   # and whatever else without interference from each other.