Implement core support for FixedDoubleArrays.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 55d1e9a174550ced4914035086a9eeec33540feb..5ea7e33320f5d3343d588ecab8da154c56c30ae9 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 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:
@@ -39,7 +39,7 @@ namespace internal {
 
 class Factory {
  public:
-  // Allocate a new fixed array with undefined entries.
+  // Allocate a new uninitialized fixed array.
   Handle<FixedArray> NewFixedArray(
       int size,
       PretenureFlag pretenure = NOT_TENURED);
@@ -49,6 +49,11 @@ class Factory {
       int size,
       PretenureFlag pretenure = NOT_TENURED);
 
+  // Allocate a new uninitialized fixed double array.
+  Handle<FixedArray> NewFixedDoubleArray(
+      int size,
+      PretenureFlag pretenure = NOT_TENURED);
+
   Handle<NumberDictionary> NewNumberDictionary(int at_least_space_for);
 
   Handle<StringDictionary> NewStringDictionary(int at_least_space_for);