Fix for issue 6359 - Make snapshots platform independent.

vm/snapshot.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_SNAPSHOT_H_
 #define VM_SNAPSHOT_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
@@ skipping 245 matching lines @@
   RawFunction* NewFunction();
   RawField* NewField();
   RawLibrary* NewLibrary();
   RawLibraryPrefix* NewLibraryPrefix();
   RawNamespace* NewNamespace();
   RawScript* NewScript();
   RawLiteralToken* NewLiteralToken();
   RawGrowableObjectArray* NewGrowableObjectArray();
   RawApiError* NewApiError();
   RawLanguageError* NewLanguageError();
+  RawObject* NewInteger(int64_t value);
 
  private:
   class BackRefNode : public ZoneAllocated {
    public:
     BackRefNode(Object* reference, DeserializeState state)
         : reference_(reference), state_(state) {}
     Object* reference() const { return reference_; }
     bool is_deserialized() const { return state_ == kIsDeserialized; }
     void set_state(DeserializeState state) { state_ = state; }
 
@@ skipping 311 matching lines @@
  private:
   SnapshotWriter* writer_;
   bool as_references_;
 
   DISALLOW_COPY_AND_ASSIGN(SnapshotWriterVisitor);
 };
 
 }  // namespace dart
 
 #endif  // VM_SNAPSHOT_H_