Perf bisect traced performance regression to this CL:

8.1% regression in angle_perftests/DrawCallPerf_d3d9_null/score
6.2% regression in angle_perftests/DrawCallPerf_d3d11_null/score

BUG=angleproject:197

This reverts commit 868651d3.

Change-Id: Iaba7eb4e574eb886496361e61fd5fe78ca14dcb8
Reviewed-on: https://chromium-review.googlesource.com/311150
Tryjob-Request: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>