Begin weaning GrClipMaskManager off of GrDrawTarget (take 2)

include/gpu/GrClip.h

Index: include/gpu/GrClip.h
diff --git a/include/gpu/GrClip.h b/include/gpu/GrClip.h
index cf6e65c976289c52906e3db2183c7ce884cc6a5d..fd8b970e39dc8861695181a369429a0a71d60240 100644
--- a/include/gpu/GrClip.h
+++ b/include/gpu/GrClip.h
@@ -114,6 +114,13 @@ public:
         }
     }
 
+    void setIRect(const SkIRect& irect) {
+        this->reset();
+        fClipType = kIRect_ClipType;
+        fOrigin.setZero();
+        fClip.fIRect = irect;
+    }
+
     const SkIRect& irect() const {
         SkASSERT(kIRect_ClipType == fClipType);
         return fClip.fIRect;