Some new regexp infrastructure.

src/list.h

Index: src/list.h
diff --git a/src/list.h b/src/list.h
index 34b18fbe98662c4c6956bea3700cade7760d7e1c..1fe9067631c972e1afeb79767bfbcf1214140626 100644
--- a/src/list.h
+++ b/src/list.h
@@ -46,6 +46,7 @@ namespace v8 { namespace internal {
 template <typename T, class P>
 class List {
  public:
+
   INLINE(explicit List(int capacity)) { Initialize(capacity); }
   INLINE(~List()) { DeleteData(data_); }
 
@@ -67,6 +68,8 @@ class List {
 
   Vector<T> ToVector() { return Vector<T>(data_, length_); }
 
+  Vector<const T> ToConstVector() { return Vector<const T>(data_, length_); }
+
   // Adds a copy of the given 'element' to the end of the list,
   // expanding the list if necessary.
   T& Add(const T& element);