Just an experiment

src/gpu/batches/GrBatch.h

Index: src/gpu/batches/GrBatch.h
diff --git a/src/gpu/batches/GrBatch.h b/src/gpu/batches/GrBatch.h
index c5fc80c5d50dfbd622dfb69e3eb9adfbcd3c31f9..fe8a6ec90d599a64ef15dbe53821ab7811204e63 100644
--- a/src/gpu/batches/GrBatch.h
+++ b/src/gpu/batches/GrBatch.h
@@ -14,6 +14,8 @@
 #include "SkRect.h"
 #include "SkString.h"
 
+#include "draws/GrDraw.h"
+
 class GrCaps;
 class GrBatchFlushState;
 
@@ -109,6 +111,10 @@ public:
     /** Used for spewing information about batches when debugging. */
     virtual SkString dumpInfo() const = 0;
 
+    // TODO put on stack
+    void setDrawSnap(const GrDrawSnap* snap) const { fSnap.reset(snap); }
+    const GrDrawSnap* drawSnap() const { return fSnap.get(); }
+
 protected:
     // NOTE, compute some bounds, even if extremely conservative.  Do *NOT* setLargest on the bounds
     // rect because we outset it for dst copy textures
@@ -150,6 +156,11 @@ private:
     const uint32_t                      fUniqueID;
     static int32_t                      gCurrBatchUniqueID;
 #endif
+
+
+    // TODO put this on the stack, also does it belong here
+    mutable SkAutoTUnref<const GrDrawSnap>    fSnap;
+
     static int32_t                      gCurrBatchClassID;
     typedef GrNonAtomicRef INHERITED;
 };