Serialize maps without hashes.

runtime/vm/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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 7218 matching lines @@
   void SetDeletedKeys(intptr_t value) const {
     StoreSmi(&raw_ptr()->deleted_keys_, Smi::New(value));
   }
   static intptr_t deleted_keys_offset() {
     return OFFSET_OF(RawLinkedHashMap, deleted_keys_);
   }
 
  private:
   FINAL_HEAP_OBJECT_IMPLEMENTATION(LinkedHashMap, Instance);
 
+  // Keep this in sync with Dart implementation (lib/compact_hash.dart).
+  static const intptr_t kInitialIndexBits = 3;
+  static const intptr_t kInitialIndexSize = 1 << (kInitialIndexBits + 1);
+
   // Allocate a map, but leave all fields set to null.
   // Used during deserialization (since map might contain itself as key/value).
   static RawLinkedHashMap* NewUninitialized(Heap::Space space = Heap::kNew);
 
   friend class Class;
 };
 
 
 class Closure : public AllStatic {
  public:
@@ skipping 543 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_