SkOnce: add option to call another cleanup function once at exit.

include/core/SkData.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 119 matching lines @@
     ReleaseProc fReleaseProc;
     void*       fReleaseProcContext;
 
     const void* fPtr;
     size_t      fSize;
 
     SkData(const void* ptr, size_t size, ReleaseProc, void* context);
     virtual ~SkData();
 
     // Called the first time someone calls NewEmpty to initialize the singleton.
-    static void NewEmptyImpl(SkData**);
+    static void NewEmptyImpl(int/*unused*/);
 
     typedef SkRefCnt INHERITED;
 };
 
 /** Typedef of SkAutoTUnref<SkData> for automatically unref-ing a SkData. */
 typedef SkAutoTUnref<SkData> SkAutoDataUnref;
 
 #endif