Resolve a few memory leaks in tests.

src/lazy/SkCachingPixelRef.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCachingPixelRef_DEFINED
 #define SkCachingPixelRef_DEFINED
 
 #include "SkImageInfo.h"
 #include "SkImageGenerator.h"
 #include "SkPixelRef.h"
 
 class SkColorTable;
 
 /**
  *  PixelRef which defers decoding until SkBitmap::lockPixels() is
  *  called.  Caches the decoded images in the global
  *  SkScaledImageCache.  When the pixels are unlocked, this cache may
  *  or be destroyed before the next lock.  If so, onLockPixels will
  *  attempt to re-decode.
  *
  *  Decoding is handled by the SkImageGenerator
  */
 class SkCachingPixelRef : public SkPixelRef {
 public:
+    SK_DECLARE_INST_COUNT(SkCachingPixelRef)
     /**
      *  Takes ownership of SkImageGenerator.  If this method fails for
      *  whatever reason, it will return false and immediatetely delete
      *  the generator.  If it succeeds, it will modify destination
      *  bitmap.
      *
      *  If Install fails or when the SkCachingPixelRef that is
      *  installed into destination is destroyed, it will call
      *  SkDELETE() on the generator.  Therefore, generator should be
      *  allocated with SkNEW() or SkNEW_ARGS().
@@ skipping 21 matching lines @@
     bool                    fErrorInDecoding;
     void*                   fScaledCacheId;
     const size_t            fRowBytes;
 
     SkCachingPixelRef(const SkImageInfo&, SkImageGenerator*, size_t rowBytes);
 
     typedef SkPixelRef INHERITED;
 };
 
 #endif  // SkCachingPixelRef_DEFINED