Improve handling of inverse clip paths in GrClipMaskManager.

Will require rebaselining of complexclip_aa and complexclip_aa_layer on GPU.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/6907052

git-svn-id: http://skia.googlecode.com/svn/trunk@6712 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed