Causing failures in the WebGL1 test: conformance/glsl/misc/shader-with-non-reserved-words.html

This reverts commit b5f88853.

Change-Id: I2105c8040057665abda00435e8c0ff8a83af3645
Reviewed-on: https://chromium-review.googlesource.com/289192Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>