Failes the gles2_conform_test:

GLES2ConformTest.GL2Tests_glGetUniform_input_run

Possibly also WebGL failures, will investigate.

BUG=angleproject:1123

This reverts commit 10750cb9.

Change-Id: I1ae59325e1831589019bc5a27ffc2091d3994a65
Reviewed-on: https://chromium-review.googlesource.com/298200Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>