Culling API

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index cdc798e619925ca2146ae575b79339c1a2bb6f57..841e1d4ebcc78a320de8ad895759e0b266afee6e 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -239,13 +239,14 @@ protected:
     // V18: SkBitmap now records x,y for its pixelref origin, instead of offset.
     // V19: encode matrices and regions into the ops stream
     // V20: added bool to SkPictureImageFilter's serialization (to allow SkPicture serialization)
+    // V21: add pushCull, popCull
 
     // Note: If the picture version needs to be increased then please follow the
     // steps to generate new SKPs in (only accessible to Googlers): http://goo.gl/qATVcw
 
     // Only SKPs within the min/current picture version range (inclusive) can be read.
     static const uint32_t MIN_PICTURE_VERSION = 19;
-    static const uint32_t CURRENT_PICTURE_VERSION = 20;
+    static const uint32_t CURRENT_PICTURE_VERSION = 21;
 
     // fPlayback, fRecord, fWidth & fHeight are protected to allow derived classes to
     // install their own SkPicturePlayback-derived players,SkPictureRecord-derived