also limit loops-per-canvas in picture_record_dictionaries, which has the same problem as unique_paint

BUG=
R=robertphillips@google.com

Review URL: https://codereview.chromium.org/23513065

git-svn-id: http://skia.googlecode.com/svn/trunk@11327 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed