Use GrDrawTarget::AutoClipRestore to set temporary irect clips.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/6937048

git-svn-id: http://skia.googlecode.com/svn/trunk@6793 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed