Add an interface for retrieving the value of unsigned 64-bit integers.

runtime/bin/dartutils.cc

 // 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.
 
 #include "bin/dartutils.h"
 
 const char* DartUtils::kBuiltinLibURL = "./dart:builtin-lib";
 const char* DartUtils::kBuiltinLibSpec = "library { }";
 const char* DartUtils::kIdFieldName = "_id";
 
 
 int64_t DartUtils::GetIntegerValue(Dart_Handle value_obj) {
   ASSERT(Dart_IsInteger(value_obj));
   int64_t value = 0;
-  Dart_Handle result = Dart_IntegerValue(value_obj, &value);
+  Dart_Handle result = Dart_IntegerToInt64(value_obj, &value);
   ASSERT(!Dart_IsError(result));
   return value;
 }
 
 const char* DartUtils::GetStringValue(Dart_Handle str_obj) {
   const char* cstring = NULL;
   Dart_Handle result = Dart_StringToCString(str_obj, &cstring);
   ASSERT(!Dart_IsError(result));
   return cstring;
 }
@@ skipping 25 matching lines @@
 }
 
 void DartUtils::SetStringInstanceField(Dart_Handle handle,
                                        const char* name,
                                        const char* val) {
   Dart_Handle result = Dart_SetInstanceField(handle,
                                              Dart_NewString(name),
                                              Dart_NewString(val));
   ASSERT(!Dart_IsError(result));
 }