Roll ANGLE 2b7bbc2..06f8637

https://chromium.googlesource.com/angle/angle.git/+log/2b7bbc2..06f8637

BUG=797253
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
TBR=jmadill@chromium.org,thestig@chromium.org

Change-Id: I85383d0eb6618c11b306d954d7c697a44a8a090d
Reviewed-on: https://chromium-review.googlesource.com/843229Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526057}

DEPS

@@ -90,7 +90,7 @@ 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': '2b7bbc2822805fc29d19ba93a365d8e02e84d045',
+  'angle_revision': '06f8637740116fa3bc4c30b513fc3ae4a0534521',
   # 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.