SkPicture::SnapshotArray doesn't really stand to benefit from refcounting.

src/core/SkPictureRecorder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkData.h"
 #include "SkLayerInfo.h"
 #include "SkPictureRecorder.h"
@@ skipping 43 matching lines @@
         if (saveLayerData) {
             SkRecordComputeLayers(fCullRect, *fRecord, fBBH.get(), saveLayerData);
         } else {
             SkRecordFillBounds(fCullRect, *fRecord, fBBH.get());
         }
     }
 
     // TODO: we should remember these from our caller
     SkBBHFactory* factory = NULL;
     uint32_t recordFlags = 0;
-    SkAutoTUnref<SkPicture::SnapshotArray> drawablePicts(
+    SkAutoTDelete<SkPicture::SnapshotArray> drawablePicts(
             fRecorder->newDrawableSnapshot(factory, recordFlags));
     SkPicture* pict = SkNEW_ARGS(SkPicture, (fCullRect, fRecord.detach(),
                                              drawablePicts.detach(), fBBH.get()));
 
     if (saveLayerData) {
         pict->EXPERIMENTAL_addAccelData(saveLayerData);
     }
 
     return pict;
 }
 
 void SkPictureRecorder::partialReplay(SkCanvas* canvas) const {
     if (NULL == canvas) {
         return;
     }
 
     int drawableCount = 0;
     SkRecordDraw(*fRecord, canvas, NULL, drawableCount, NULL/*bbh*/, NULL/*callback*/);
 }