move decision to smash invmatrix into unit-space (for faster repeat/mirror to after the call to possiblyScaleImage(), so we don't confuse that code with a munged matrix. Fixes the scaled_tilemodes gm for HQ

BUG=
R=humper@google.com

Review URL: https://codereview.chromium.org/23470005

git-svn-id: http://skia.googlecode.com/svn/trunk/src@11152 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed