Roll ANGLE c287ea6..28a97ee

https://chromium.googlesource.com/angle/angle.git/+log/c287ea6..28a97ee

BUG=chromium:648031,chromium:648135,648063,607283,645532,chromium:648074

TBR=geofflang@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

Merge branch 'master' of https://chromium.googlesource.com/chromium/src

fuzzers: add a fuzzer for the ANGLE shader translator

BUG=angleproject:1522

Review-Url: https://codereview.chromium.org/2364873003
Cr-Commit-Position: refs/heads/master@{#420732}

DEPS

@@ -51,7 +51,7 @@ 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': 'c287ea6e0a64e36d0bb1e87dcc2e0f24876b88c9',
+  'angle_revision': '28a97ee11a38d9b4ac1e7adfb9343e228a5ed6ce',
   # 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.