stop calling SkBitmap::flatten

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 58335ac728652245d2535e55488627e20c6ac9df..44681ea7e619ba8b7d0e5c0383a33cf24e617faa 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -328,13 +328,14 @@ protected:
     // V25: SkDashPathEffect now only writes phase and interval array when flattening
     // V26: Removed boolean from SkColorShader for inheriting color from SkPaint.
     // V27: Remove SkUnitMapper from gradients (and skia).
+    // V28: No longer call bitmap::flatten inside SkWriteBuffer::writeBitmap.
 
     // 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 = 27;
+    static const uint32_t CURRENT_PICTURE_VERSION = 28;
 
     mutable uint32_t      fUniqueID;