Revert "fix legacy makeRasterImage()"

This reverts commit 7c4ca043361f6adb3d17a9d3db2397d86bac5a2d.

Reason for revert: layout, cereal tests?

Original change's description:
> fix legacy makeRasterImage()
> 
> Passing the color space down into SkImage_Lazy ends up triggering a
> SkTransferFunctionBehavior::kRespect decode (tf(r*a)), where we want
> ignore (tf(r)*a) to have any hope of working with the legacy backend.
> 
> This fix in turn needs another little extension of another old hack in
> SkImage_Gpu for makeNonTextureImage() to keep working there.
> 
> Bug: skia:7479
> 
> Change-Id: If48ca68e95d9eee597f6b10434498049981314ba
> Reviewed-on: https://skia-review.googlesource.com/93380
> Commit-Queue: Mike Klein <mtklein@chromium.org>
> Reviewed-by: Brian Osman <brianosman@google.com>

TBR=mtklein@chromium.org,brianosman@google.com

Change-Id: I65092e01d767ef1fd35563f0b79ceded3c12b267
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:7479
Reviewed-on: https://skia-review.googlesource.com/93820
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
4 files changed