Roll ANGLE 12b0b39..579d8c7

https://chromium.googlesource.com/angle/angle.git/+log/12b0b39..579d8c7

BUG=chromium:727671,728226,chromium:682815,731089,chromium:697758

TBR=jmadill@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: Iccc5538b77641dce7ecfb9adb25930b9d916806b
Reviewed-on: https://chromium-review.googlesource.com/545056Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#481610}

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': '12b0b399aaa22d0f5df0784997753f74ecdb8e36',
+  'angle_revision': '579d8c7dfcfaeb44fc7a650cd151539d87eedcd2',
   # 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.