Fixups for clipstack, convexity test for paths.

Review URL http://codereview.appspot.com/4250056/

git-svn-id: http://skia.googlecode.com/svn/trunk@891 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/include/GrClipIterator.h b/gpu/include/GrClipIterator.h
index abad619..1fcbdd1 100644
--- a/gpu/include/GrClipIterator.h
+++ b/gpu/include/GrClipIterator.h
@@ -68,8 +68,8 @@
     virtual GrSetOp getOp() const = 0;
 
     /**
-     *  Call to move to the next rect in the set, previous path iter can be made
-     *  invalid.
+     *  Call to move to the next element in the list, previous path iter can be
+     *  made invalid.
      */
     virtual void next() = 0;
 };