Revert of remove unused (by clients) SkUnitMapper (https://codereview.chromium.org/283273002/)
Reason for revert:
does not address all legacy callsites in chrome.
e.g.
[13:45:32.091872] ../../ui/native_theme/native_theme_base.cc:608:76: error: no matching function for call to ‘SkGradientShader::CreateLinear(SkPoint [3], SkColor [3], NULL, int, SkShader::TileMode, NULL)’
[13:45:32.091919] gradient_bounds, colors, NULL, 3, SkShader::kClamp_TileMode, NULL));
Original issue's description:
> remove unused (by clients) SkUnitMapper
>
> BUG=skia:
>
> Committed: http://code.google.com/p/skia/source/detail?r=14761
R=robertphillips@google.com, scroggo@google.com, george@mozilla.com
TBR=george@mozilla.com, robertphillips@google.com, scroggo@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:
Author: reed@google.com
Review URL: https://codereview.chromium.org/287063009
git-svn-id: http://skia.googlecode.com/svn/trunk@14763 2bbb7eff-a529-9590-31e7-b0007b416f81
e2b193ca5c