This reverts commit d9ee8bf9.

Reason for revert: Slightly regresses tests that have dirty objects.

See https://chromeperf.appspot.com/report?sid=abdb797da7149beffa29dc8a0869c15d96794749eff50bcb36c07d85fe509096

Original change's description:
> 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>

TBR=ynovikov@chromium.org,geofflang@chromium.org,jmadill@chromium.org

Change-Id: I6fdd34880a711ecc89d407ae90f3991584f65272
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2966
Reviewed-on: https://chromium-review.googlesource.com/c/1340199Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>