Replace fixed-size array of effect stages in GrDrawState with two appendable arrays, one for color, one for coverage.

R=robertphillips@google.com

Review URL: https://codereview.chromium.org/16952006

git-svn-id: http://skia.googlecode.com/svn/trunk@9592 2bbb7eff-a529-9590-31e7-b0007b416f81
20 files changed