Fix dartbug.com/15963:

runtime/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 234 matching lines @@
   // of various object types. These are used when reading a
   // full snapshot.
   RawArray* NewArray(intptr_t len);
   RawImmutableArray* NewImmutableArray(intptr_t len);
   RawOneByteString* NewOneByteString(intptr_t len);
   RawTwoByteString* NewTwoByteString(intptr_t len);
   RawTypeArguments* NewTypeArguments(intptr_t len);
   RawTokenStream* NewTokenStream(intptr_t len);
   RawContext* NewContext(intptr_t num_variables);
   RawClass* NewClass(intptr_t class_id);
+  RawInstance* NewInstance();
   RawMint* NewMint(int64_t value);
   RawBigint* NewBigint(const char* hex_string);
   RawDouble* NewDouble(double value);
   RawUnresolvedClass* NewUnresolvedClass();
   RawType* NewType();
   RawTypeRef* NewTypeRef();
   RawTypeParameter* NewTypeParameter();
   RawBoundedType* NewBoundedType();
   RawMixinAppType* NewMixinAppType();
   RawPatchClass* NewPatchClass();
@@ skipping 352 matching lines @@
  private:
   SnapshotWriter* writer_;
   bool as_references_;
 
   DISALLOW_COPY_AND_ASSIGN(SnapshotWriterVisitor);
 };
 
 }  // namespace dart
 
 #endif  // VM_SNAPSHOT_H_