Revert "alternate approach to unpremul scalePixels()"

This reverts commit c4616804bb407506c6ac1046c7e25e2016911449.

Reason for revert: screwed up the guard I think

Original change's description:
> alternate approach to unpremul scalePixels()
> 
> We want to keep the clamps in SkImageShader, and keep unpremul
> scalePixels() happy too.
> 
> So we extend SkImageShader's internal API to allow specifying an output
> alpha type, which controls whether we premul or unpremul and how we
> clamp.  scalePixels() uses this to draw instead of a drawBitmap() call.
> 
> Sort of backwards of usual, we opt our local builds into
> SK_LEGACY_HIGH_QUALITY_SCALING_CLAMP (and Google3 is already defining
> this).  Then to rebase Chromium we will _define_ this in Chromium's user
> config, fold it through as if always defined in Skia, then finally
> remove the definition from Chromium's user config.
> 
> Change-Id: I38035f0886f79700e7301c3c6042ce362c771d96
> Reviewed-on: https://skia-review.googlesource.com/90480
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Mike Klein <mtklein@chromium.org>

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

Change-Id: Ib53a7f29c25310b667f9a61f67f8638403ec9da3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/106220
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>

0 files changed, 0 insertions, 0 deletions