https://groups.google.com/forum/#!topic/skia-discuss/2F2she2nQMg

src/core/SkData.cpp

 /*
  * Copyright 2011 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 "SkOSFile.h"
 #include "SkOncePtr.h"
@@ skipping 60 matching lines @@
     }
 
     char* storage = (char*)sk_malloc_throw(actualLength);
     SkData* data = new (storage) SkData(length);
     if (srcOrNull) {
         memcpy(data->writable_data(), srcOrNull, length);
     }
     return sk_sp<SkData>(data);
 }
 
+void SkData::DummyReleaseProc(const void*, void*) {}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 SK_DECLARE_STATIC_ONCE_PTR(SkData, gEmpty);
 sk_sp<SkData> SkData::MakeEmpty() {
     SkData* data = SkRef(gEmpty.get([]{return new SkData(nullptr, 0, nullptr, nullptr); }));
     return sk_sp<SkData>(data);
 }
 
 // assumes fPtr was allocated via sk_malloc
 static void sk_free_releaseproc(const void* ptr, void*) {
@@ skipping 94 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkData> SkData::MakeFromStream(SkStream* stream, size_t size) {
     sk_sp<SkData> data(SkData::MakeUninitialized(size));
     if (stream->read(data->writable_data(), size) != size) {
         return nullptr;
     }
     return data;
 }