Gave GrClip an SkClipStack-style iterator

http://codereview.appspot.com/6434046/



git-svn-id: http://skia.googlecode.com/svn/trunk@4723 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrClipMaskManager.h b/src/gpu/GrClipMaskManager.h
index 8106185..4346c21 100644
--- a/src/gpu/GrClipMaskManager.h
+++ b/src/gpu/GrClipMaskManager.h
@@ -350,8 +350,7 @@
     bool useSWOnlyPath(const GrClip& clipIn);
 
     bool drawClipShape(GrTexture* target,
-                       const GrClip& clipIn,
-                       int index,
+                       const GrClip::Iter::Clip* clip,
                        const GrIRect& resultBounds);
 
     void drawTexture(GrTexture* target,