New bigint implementation in the vm.

runtime/lib/corelib_sources.gypi

 # Copyright (c) 2011, 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.
 
 # Sources visible via default library.
 
 {
   'sources': [
     'core_patch.dart',
     # The above file needs to be first as it imports required libraries.
+    'array.cc',
+    'array.dart',
+    'array_patch.dart',
+    'bigint.dart',
     'bool.cc',
     'bool_patch.dart',
     'date.cc',
     'date_patch.dart',
-    'array.cc',
-    'array.dart',
-    'array_patch.dart',
     'double.cc',
     'double.dart',
     'double_patch.dart',
     'errors.cc',
     'errors_patch.dart',
     'expando_patch.dart',
     'function.cc',
     'function.dart',
     'function_patch.dart',
     'growable_array.cc',
@@ skipping 12 matching lines @@
     'num.cc',
     'num.dart',
     'object.cc',
     'object_patch.dart',
     'regexp.cc',
     'regexp_jsc.cc',
     'regexp_jsc.h',
     'regexp_patch.dart',
     'stacktrace.cc',
     'stacktrace_patch.dart',
+    'stopwatch.cc',
     'stopwatch_patch.dart',
-    'stopwatch.cc',
     'string.cc',
+    'string_buffer_patch.dart',
     'string_patch.dart',
-    'string_buffer_patch.dart',
     'type_patch.dart',
     'uri.cc',
     'uri_patch.dart',
+    'weak_property.cc',
     'weak_property.dart',
-    'weak_property.cc',
   ],
 }