Revert 273648 "skia: Use medium filter quality in PaintSimplifier."

Revert 273648 "skia: Use medium filter quality in PaintSimplifier."

> skia: Use medium filter quality in PaintSimplifier.
> 
> Preventing all bitmap filtering in the paint simplifier is a bad
> idea as it's very cache unfriendly when down-sampling due to
> requiring both the full size decoded image and the high/medium
> quality image normally used to be cached for good performance.
> 
> However, forcing medium quality filtering is worthwhile as it's
> faster than high quality and still provides caching benefits.
> 
> BUG=
> 
> Review URL: https://codereview.chromium.org/305623008

Looks like this had a negative effect on memory usage.

TBR=reveman@chromium.org
BUG=379164
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=273914

[reveman, 2014-05-30 21:48:42]

Committed patchset #1 manually as r273914 (tree was closed).