reorg iteration code in rrects GM, tightly pack rrects drawn in _effect version.

R=robertphillips@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/190953008

git-svn-id: http://skia.googlecode.com/svn/trunk@13728 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed