remove Sk64 from public API, and start to remove usage internally

include/core/SkTypes.h

-
 /*
  * Copyright 2006 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 SkTypes_DEFINED
 #define SkTypes_DEFINED
 
 #include "SkPreConfig.h"
 #include "SkUserConfig.h"
 #include "SkPostConfig.h"
 #include <stdint.h>
 
+//#define SK_SUPPORT_LEGACY_SK64
+
 /** \file SkTypes.h
 */
 
 /** See SkGraphics::GetVersion() to retrieve these at runtime
  */
 #define SKIA_VERSION_MAJOR  1
 #define SKIA_VERSION_MINOR  0
 #define SKIA_VERSION_PATCH  0
 
 /*
@@ skipping 602 matching lines @@
 private:
     void*       fPtr;
     size_t      fSize;  // can be larger than the requested size (see kReuse)
     uint32_t    fStorage[(kSize + 3) >> 2];
 };
 // Can't guard the constructor because it's a template class.
 
 #endif /* C++ */
 
 #endif