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Currently we scale all such shaders and rewrite them out as fixed scale
(with a local matrix).  This changes the serialization process and also
adds a matrix where there was not one before.

For the sake of the equality fuzzer, add an option where we don't modify
what we are serializing in this case.

Bug: 898356
Change-Id: I433b921a6e799c2f2d912e6fa61d61bd6a82e2a8
Reviewed-on: https://chromium-review.googlesource.com/c/1298423Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: enne <enne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602553}