Resolve a few memory leaks in tests.

include/core/SkMallocPixelRef.h

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkMallocPixelRef_DEFINED
 #define SkMallocPixelRef_DEFINED
 
 #include "SkPixelRef.h"
 
 /** We explicitly use the same allocator for our pixels that SkMask does,
     so that we can freely assign memory allocated by one class to the other.
 */
 class SK_API SkMallocPixelRef : public SkPixelRef {
 public:
+    SK_DECLARE_INST_COUNT(SkMallocPixelRef)
     /**
      *  Return a new SkMallocPixelRef with the provided pixel storage, rowBytes,
      *  and optional colortable. The caller is responsible for managing the
      *  lifetime of the pixel storage buffer, as this pixelref will not try
      *  to delete it.
      *
      *  The pixelref will ref() the colortable (if not NULL).
      *
      *  Returns NULL on failure.
      */
@@ skipping 71 matching lines @@
     void*           fReleaseProcContext;
 
     SkMallocPixelRef(const SkImageInfo&, void* addr, size_t rb, SkColorTable*,
                      ReleaseProc proc, void* context);
 
     typedef SkPixelRef INHERITED;
 };
 
 
 #endif