Changes to get rid of dependency on openssl in the dart VM.

vm/raw_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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
@@ skipping 816 matching lines @@
 
   int64_t value_;
 
   friend class SnapshotReader;
 };
 
 
 class RawBigint : public RawInteger {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Bigint);
 
-  // Note that the structure is not necessarily valid unless tweaked
-  // by Bigint::BNAddr().
-  BIGNUM bn_;
+  // Actual length at the time of allocation (later we may clamp the
+  // operational length but we need to maintain a consistent object
+  // length so that the object can be traversed during GC).
+  intptr_t allocated_length_;
 
-  // Variable length data follows here.
-  BN_ULONG data_[0];
+  // Operation length of the bigint object, clamping can cause this length
+  // to be reduced. If the signed_length_ is negative then the number
+  // is negative.
+  intptr_t signed_length_;
+
+  // A sequence of Chunks (typedef in Bignum) representing bignum digits.
+  // Bignum::Chunk chunks_[Utils::Abs(signed_length_)];
+  uint8_t data_[0];
 };
 
 
 class RawDouble : public RawNumber {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Double);
 
   double value_;
 
   friend class SnapshotReader;
 };
@@ skipping 245 matching lines @@
   RawString* target_name_;  // Name of target function.
   RawArray* ic_data_;  // Contains test classes and target function.
   intptr_t id_;  // Parser node id corresponding to this IC.
   intptr_t num_args_tested_;  // Number of arguments tested in IC.
 };
 
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_