Hide Isolate pointer from embedder

runtime/platform/globals.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 254 matching lines @@
 
 
 // Short form printf format specifiers
 #define Pd PRIdPTR
 #define Pu PRIuPTR
 #define Px PRIxPTR
 #define Pd64 PRId64
 #define Pu64 PRIu64
 #define Px64 PRIx64
 
-
 // Suffixes for 64-bit integer literals.
 #ifdef _MSC_VER
 #define DART_INT64_C(x) x##I64
 #define DART_UINT64_C(x) x##UI64
 #else
 #define DART_INT64_C(x) x##LL
 #define DART_UINT64_C(x) x##ULL
 #endif
 
 // Replace calls to strtoll with _strtoi64 on Windows.
@@ skipping 258 matching lines @@
 // should be counted from two, not one."
 #define PRINTF_ATTRIBUTE(string_index, first_to_check) \
   __attribute__((__format__(__printf__, string_index, first_to_check)))
 #else
 #define PRINTF_ATTRIBUTE(string_index, first_to_check)
 #endif
 
 }  // namespace dart
 
 #endif  // PLATFORM_GLOBALS_H_