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

runtime/vm/object.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 "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 10342 matching lines @@
 
 
 RawInteger* Integer::New(int64_t value, Heap::Space space) {
   if ((value <= Smi::kMaxValue) && (value >= Smi::kMinValue)) {
     return Smi::New(value);
   }
   return Mint::New(value, space);
 }
 
 
+RawInteger* Integer::NewFromUint64(uint64_t value, Heap::Space space) {
+  if (value > static_cast<uint64_t>(Mint::kMaxValue)) {
+    return BigintOperations::NewFromUint64(value);
+  } else {
+    return Integer::New(value);
+  }
+}
+
+
 double Integer::AsDoubleValue() const {
   UNIMPLEMENTED();
   return 0.0;
 }
 
 
 int64_t Integer::AsInt64Value() const {
   UNIMPLEMENTED();
   return 0;
 }
@@ skipping 2868 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart