Roll src/third_party/angle/ 59c5b897e..00af463e0 (10 commits)

https://chromium.googlesource.com/angle/angle.git/+log/59c5b897ec70..00af463e03ef

$ git log 59c5b897e..00af463e0 --date=short --no-merges --format='%ad %ae %s'
2018-04-02 lfy GLES1: Add MatrixType packed enum to entry points
2018-03-30 courtneygo Fix Tokenizer issue
2018-04-04 oetuaho Disallow case statements nested in blocks
2018-03-29 lfy GLES1: glMultiTexCoord4(f|x)
2018-03-31 jmadill Vulkan: Move image layout into helper.
2018-04-04 lucferron Vulkan: Follow up change to optimize number of condition checks
2018-03-29 lucferron Vulkan: Implement stencil test support
2018-03-29 lucferron Vulkan: Depth/stencil scissored clears
2018-03-31 jmadill Vulkan: Use DrawCallParams in draw methods.
2018-04-04 jmadill Move Buffer Subject/Observer to front end.

Created with:
  roll-dep src/third_party/angle


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;master.tryserver.chromium.win:win_optional_gpu_tests_rel
TBR=fjhenigman@chromium.org

Change-Id: Ic802b0a7271300e23c6e9585a34204177a3f6e17
Reviewed-on: https://chromium-review.googlesource.com/997097
Commit-Queue: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#548324}

DEPS

@@ -94,7 +94,7 @@ 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': '59c5b897ec7068e13ba876b791933b5a64ec9de9',
+  'angle_revision': '00af463e03efd3bf4449420889a892632915fee4',
   # 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.