Add performance benchmark before landing perf improvements that remove sk_bezero in SkMatrix44

BUG=skia:1558
R=jvanverth@google.com

Review URL: https://codereview.chromium.org/22872015

git-svn-id: http://skia.googlecode.com/svn/trunk@10967 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed