This will be used in Blink to accommodate matrices that contain
rotation or shearing. This is a generalization of SkResizeImageFilter,
so I've replaced all uses of SkResizeImageFilter in Skia. (It might be
easier to review by diffing it with SkResizeImageFilter, too.)
R=reed@google.com
Review URL: https://codereview.chromium.org/211103006
git-svn-id: http://skia.googlecode.com/svn/trunk@13941 2bbb7eff-a529-9590-31e7-b0007b416f81