use new instead of createCompatibleDevice, since we know the subclass we want

BUG=skia:
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/141443009

git-svn-id: http://skia.googlecode.com/svn/trunk@13353 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed