Add flipped gradient branch to two point conical gradient

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 9690469d9f13ef1f6513df2d481fd7e1e2f8de5b..cb6b98e9ed3d239f214e8533e4dc0dd030d125ae 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -310,13 +310,14 @@ protected:
     // V21: add pushCull, popCull
     // V22: SK_PICT_FACTORY_TAG's size is now the chunk size in bytes
     // V23: SkPaint::FilterLevel became a real enum
+    // V24: SkTwoPointConicalGradient now has fFlipped flag for gradient flipping
 
     // 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 = 23;
+    static const uint32_t CURRENT_PICTURE_VERSION = 24;
 
     mutable uint32_t      fUniqueID;