Ensure that service protocol specification and implementation use the correct numeric types

runtime/vm/json_stream.h

 // Copyright (c) 2013, 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 VM_JSON_STREAM_H_
 #define VM_JSON_STREAM_H_
 
 #include "include/dart_api.h"  // for Dart_Port
 #include "platform/json.h"
 #include "vm/allocation.h"
@@ skipping 154 matching lines @@
   void PrintPropertyName(const char* name);
   void PrintCommaIfNeeded();
   bool NeedComma();
 
   bool AddDartString(const String& s, intptr_t limit);
   void AddEscapedUTF8String(const char* s);
   void AddEscapedUTF8String(const char* s, intptr_t len);
 
   intptr_t nesting_level() const { return open_objects_; }
 
+  // Debug only fatal assertion.
+  static void EnsureIntegerIsRepresentableInJavaScript(int64_t i);
+
   intptr_t open_objects_;
   TextBuffer buffer_;
   // Default service id zone.
   RingServiceIdZone default_id_zone_;
   ServiceIdZone* id_zone_;
   Dart_Port reply_port_;
   Instance* seq_;
   const char* method_;
   const char** param_keys_;
   const char** param_values_;
@@ skipping 155 matching lines @@
 
   friend class JSONObject;
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(JSONArray);
 };
 
 }  // namespace dart
 
 #endif  // VM_JSON_STREAM_H_