Roll ANGLE.

Contains latest es3proto changes.

Review URL: https://codereview.chromium.org/260893008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@268234 0039d316-1c4b-4281-b951-d872f2087c98

DEPS

@@ -69,7 +69,7 @@ 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": "74697cf2064c0a2c0d7e1b1b28db439286766a05",
+  "angle_revision": "876dc7240025ef09a305ca66a9346decba715d25",
 }
 
 deps = {