Ensures that Bigints returned to Dart are all checked by Integer::AsValidInteger.

runtime/vm/object.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 VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3901 matching lines @@
     return false;
   }
   OBJECT_IMPLEMENTATION(Number, Instance);
   friend class Class;
 };
 
 
 class Integer : public Number {
  public:
   static RawInteger* New(const String& str, Heap::Space space = Heap::kNew);
+  static RawInteger* NewFromUint64(
+      uint64_t value, Heap::Space space = Heap::kNew);
 
   // Returns a canonical Integer object allocated in the old gen space.
   static RawInteger* NewCanonical(const String& str);
 
   static RawInteger* New(int64_t value, Heap::Space space = Heap::kNew);
 
   virtual double AsDoubleValue() const;
   virtual int64_t AsInt64Value() const;
 
   // Returns 0, -1 or 1.
@@ skipping 1834 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_