Roll ANGLE 677bb6f..aa7203e

https://chromium.googlesource.com/angle/angle.git/+log/677bb6f..aa7203e

BUG=

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

Review-Url: https://codereview.chromium.org/2862723006
Cr-Commit-Position: refs/heads/master@{#469541}

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': '677bb6ffc06e2ab3eeacead5ad98861dad8bf35a',
+  'angle_revision': 'aa7203ef62339db5f8f0499be7088e754412a4db',
   # 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.