Add push/pop cull to SkRecord.

src/record/SkRecorder.h

Index: src/record/SkRecorder.h
diff --git a/src/record/SkRecorder.h b/src/record/SkRecorder.h
index 9d722b4b2bccba49df12c9b5b2d9b213ed236cb5..b1782fed678a2d10fadb9fae7c673cfa89fa6931 100644
--- a/src/record/SkRecorder.h
+++ b/src/record/SkRecorder.h
@@ -57,6 +57,9 @@ public:
     void onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle);
     void onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op);
 
+    void onPushCull(const SkRect& cullRect);
+    void onPopCull();
+
 private:
     template <typename T>
     T* copy(const T*);