Use mutable heapnumbers to store doubles in fields.

src/parser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 674 matching lines @@
   ObjectLiteral::Property* ParseObjectLiteralGetSet(bool is_getter, bool* ok);
   Expression* ParseRegExpLiteral(bool seen_equal, bool* ok);
 
   // Populate the constant properties fixed array for a materialized object
   // literal.
   void BuildObjectLiteralConstantProperties(
       ZoneList<ObjectLiteral::Property*>* properties,
       Handle<FixedArray> constants,
       bool* is_simple,
       bool* fast_elements,
-      int* depth);
-
-  // Populate the literals fixed array for a materialized array literal.
-  void BuildArrayLiteralBoilerplateLiterals(ZoneList<Expression*>* properties,
-                                            Handle<FixedArray> constants,
-                                            bool* is_simple,
-                                            int* depth);
+      int* depth,
+      bool* may_store_doubles);
 
   // Decide if a property should be in the object boilerplate.
   bool IsBoilerplateProperty(ObjectLiteral::Property* property);
   // If the expression is a literal, return the literal value;
   // if the expression is a materialized literal and is simple return a
   // compile time value as encoded by CompileTimeValue::GetValue().
   // Otherwise, return undefined literal as the placeholder
   // in the object literal boilerplate.
   Handle<Object> GetBoilerplateValue(Expression* expression);
 
@@ skipping 201 matching lines @@
  private:
   static const int kTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_