Roll src/third_party/angle/ aa8b3982a..aed1b56aa (8 commits)

https://chromium.googlesource.com/angle/angle.git/+log/aa8b3982aeeb..aed1b56aac8e

$ git log aa8b3982a..aed1b56aa --date=short --no-merges --format='%ad %ae %s'
2018-04-17 jmadill Prerequisite code for simpler GlslangWrapper.
2018-04-13 lucferron Vulkan: Fix issue in GlslWrapper and maxVaryingVectors calculation
2018-04-17 lucferron Vulkan: clearRegionWithScissor did not determine the region correctly
2018-04-16 lfy GLES1: gl(Enable|Disable)ClientState
2018-04-17 jmadill Vulkan: Fix build after roll.
2018-04-17 jmadill Vulkan: Suppress ClearIssue test.
2018-04-16 jmadill Vulkan: Disable warning in Mock ICD.
2018-04-16 tobine Roll (2/2) to latest LVL as of 4/16/18

Created with:
  roll-dep src/third_party/angle
BUG=chromium:833736


The AutoRoll server is located here: https://angle-chromium-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=luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
TBR=jmadill@chromium.org

Change-Id: I7c7f1fb47c5cde7e4552f40d084fcd9d1af2e9ee
Reviewed-on: https://chromium-review.googlesource.com/1015624Reviewed-by: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#551461}

DEPS

@@ -98,7 +98,7 @@ 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': 'aa8b3982aeeb90c9d4f818117a6be1a6904def5a',
+  'angle_revision': 'aed1b56aac8e5d14f4a5101f0f85135717a3d744',
   # 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.