Hook up several drawElements variants in Context11 Turns out the issue for the skia bug is not related to index range cache but simply several new drawElemnts variants are not properly hooked up. Change-Id: I2d1ae15c74233185e4fee8a1443ffe0477f9c444 Bug: angleproject:3402, angleproject:4536 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2137943 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>