add some debugging to SkNVRefCnt

tests/PictureTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBBoxHierarchy.h"
 #include "SkBlurImageFilter.h"
 #include "SkCanvas.h"
@@ skipping 1891 matching lines @@
     SkASSERT(immut.isImmutable());
 
     // No one can hold a ref on our pixels yet.
     REPORTER_ASSERT(r, mut.pixelRef()->unique());
     REPORTER_ASSERT(r, immut.pixelRef()->unique());
 
     SkPictureRecorder rec;
     SkCanvas* canvas = rec.beginRecording(1920, 1200);
         canvas->drawBitmap(mut, 0, 0);
         canvas->drawBitmap(immut, 800, 600);
-    SkAutoTDelete<const SkPicture> pic(rec.endRecording());
+    SkAutoTUnref<const SkPicture> pic(rec.endRecording());
 
     // The picture shares the immutable pixels but copies the mutable ones.
     REPORTER_ASSERT(r, mut.pixelRef()->unique());
     REPORTER_ASSERT(r, !immut.pixelRef()->unique());
 
     // When the picture goes away, it's just our bitmaps holding the refs.
     pic.reset(NULL);
     REPORTER_ASSERT(r, mut.pixelRef()->unique());
     REPORTER_ASSERT(r, immut.pixelRef()->unique());
 }