Roll src/third_party/angle/ 6816d8438..6c59e4a15 (1 commit)

https://chromium.googlesource.com/angle/angle.git/+log/6816d84382d5..6c59e4a156c3

$ git log 6816d8438..6c59e4a15 --date=short --no-merges --format='%ad %ae %s'
2018-04-05 pwnall Migrate from <tr1/tuple> to <tuple> types.

Created with:
  roll-dep src/third_party/angle
BUG=chromium:829773


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=ynovikov@chromium.org

Change-Id: I00cb193a7ef81f6800d8f1f2c879716e62546bb3
Reviewed-on: https://chromium-review.googlesource.com/1002632Reviewed-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@{#549147}

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': '6816d84382d552a39b88c1f57e8a8e5df1a39b2c',
+  'angle_revision': '6c59e4a156c360942e401180a109cfab9544e255',
   # 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.