Serialize maps without hashes.

runtime/vm/snapshot.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/snapshot.h"
 
 #include "platform/assert.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
@@ skipping 1111 matching lines @@
                                    intptr_t len,
                                    intptr_t tags) {
   // Set the object tags.
   result.set_tags(tags);
 
   // Setup the object fields.
   *TypeArgumentsHandle() ^= ReadObjectImpl();
   result.SetTypeArguments(*TypeArgumentsHandle());
 
   bool is_canonical = RawObject::IsCanonical(tags);
-  Object& obj = Object::Handle(isolate());
 
   for (intptr_t i = 0; i < len; i++) {
     *PassiveObjectHandle() = is_canonical ? ReadObjectImpl() : ReadObjectRef();
-    obj = (*PassiveObjectHandle()).raw();
     result.SetAt(i, *PassiveObjectHandle());
   }
 }
 
 
 VmIsolateSnapshotReader::VmIsolateSnapshotReader(const uint8_t* buffer,
                                                  intptr_t size,
                                                  Zone* zone)
     : SnapshotReader(buffer,
                      size,
@@ skipping 1146 matching lines @@
     NoSafepointScope no_safepoint;
     WriteObject(obj.raw());
     UnmarkAll();
   } else {
     ThrowException(exception_type(), exception_msg());
   }
 }
 
 
 }  // namespace dart