Revert "Hide Isolate pointer from embedder"

runtime/bin/builtin_nolib.cc

 // 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.
 
 #include <stdio.h>
 
 #include "include/dart_api.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/io_natives.h"
 
 
 namespace dart {
 namespace bin {
 
 Builtin::builtin_lib_props Builtin::builtin_libraries_[] = {
   /* { url_, source_, patch_url_, patch_source_, has_natives_ } */
   { DartUtils::kBuiltinLibURL, NULL, NULL, NULL, true },
   { DartUtils::kIOLibURL, NULL, NULL, NULL, true  },
 };
 
-Dart_Port Builtin::load_port_ = DART_ILLEGAL_PORT;
+Dart_Port Builtin::load_port_ = ILLEGAL_PORT;
 
 Dart_Handle Builtin::Source(BuiltinLibraryId id) {
   return DartUtils::NewError("Unreachable code in Builtin::Source (%d).", id);
 }
 
 
 Dart_Handle Builtin::PartSource(BuiltinLibraryId id, const char* uri) {
   return DartUtils::NewError(
       "Unreachable code in Builtin::PartSource (%d).", id);
 }
@@ skipping 30 matching lines @@
   ASSERT((sizeof(builtin_libraries_) / sizeof(builtin_lib_props)) ==
          kInvalidLibrary);
   ASSERT(id >= kBuiltinLibrary && id < kInvalidLibrary);
   Dart_Handle url = DartUtils::NewString(builtin_libraries_[id].url_);
   Dart_Handle library = Dart_LookupLibrary(url);
   return library;
 }
 
 }  // namespace bin
 }  // namespace dart