Minor inlining optimization to Context draw calls. Reduces draw call overhead by up to 3%. Bug: angleproject:2966 Change-Id: Ie7ddb61b905fefe59a06a1528f0a3fde4accaf74 Reviewed-on: https://chromium-review.googlesource.com/c/1333608 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>