Revert "Optimize SkColorSpaceXformCanvas for GPU-acceleration"

This reverts commit 1d3df3848ff297e353a2d0f0fae6ec4a55ab7ba6.

Reason for revert: Mac timeouts? crbug.com/763197

Original change's description:
> Optimize SkColorSpaceXformCanvas for GPU-acceleration
> 
> This change ensures that SkImages are uploaded to the GPU before
> applying the xform when the destination canvas is on the GPU. This
> makes it possible to get hits in the texture cache and it ensures
> that transforms get computed on the GPU.
> 
> This fixes a severe performance regression in Chrome that happened
> when color correction was enabled.
> 
> Associated chromium patch for layout test rebaselines:
> https://chromium-review.googlesource.com/c/chromium/src/+/655483
> 
> Merge dependency: Merging this change to the M-62 and M-61
> branches also requires merging the following change, otherwise
> there will be rendering errors:
> https://skia-review.googlesource.com/c/skia/+/43562
> 
> BUG=chromium:760738
> 
> Change-Id: I49fd5ef7968272d311249c3824fe15bee4648b73
> Reviewed-on: https://skia-review.googlesource.com/43183
> Commit-Queue: Justin Novosad <junov@chromium.org>
> Reviewed-by: Brian Osman <brianosman@google.com>

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

Change-Id: I1a43e9b277075d1aee0efd651c899e15ac3fa53b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:760738
Reviewed-on: https://skia-review.googlesource.com/44160
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

0 files changed, 0 insertions, 0 deletions