Revert "Explicitly enable framebuffer SRGB blending in StateManagerGL." More compile errors on mac. This reverts commit 056fae4a01db306b8f9c1e57374e18ebffbdf8eb. Change-Id: I579b9e50ded7240be4f488a48588a89ecb4bea44 Reviewed-on: https://chromium-review.googlesource.com/302571 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>