Change List constructors.

sdk/lib/core/list.dart

Index: sdk/lib/core/list.dart
diff --git a/sdk/lib/core/list.dart b/sdk/lib/core/list.dart
index fb156af3401129174dc5ca06f8cca0a220869d29..199301b6775dd8b2894f2ee4365237e016aa7b64 100644
--- a/sdk/lib/core/list.dart
+++ b/sdk/lib/core/list.dart
@@ -11,17 +11,29 @@ interface List<E> extends Collection<E>, Sequence<E>
   /**
    * Creates a list of the given [length].
    *
-   * If no [length] argument is supplied an extendable list of
-   * length 0 is created.
+   * The length of the returned list is not fixed.
+   */
+  List([int length = 0]);
+
+  /**
+   * Creates a fixed-sized list of the given [length] where each entry is
+   * filled with [fill].
+   */
+  List.fixedLength(int length, {E fill: null});
+
+  /**
+   * Creates an list of the given [length] where each entry is
+   * filled with [fill].
    *
-   * If a [length] argument is supplied, a fixed size list of that
-   * length is created.
+   * The length of the returned list is not fixed.   
    */
-  List([int length]);
+  List.filled(int length, E fill);
 
   /**
-   * Creates a list with the elements of [other]. The order in
+   * Creates an list with the elements of [other]. The order in
    * the list will be the order provided by the iterator of [other].
+   *
+   * The length of the returned list is not fixed.
    */
   List.from(Iterable<E> other);
 
@@ -167,7 +179,7 @@ interface List<E> extends Collection<E>, Sequence<E>
 
   /**
    * Inserts a new range into the list, starting from [start] to
-   * [:start + length - 1:]. The entries are filled with [initialValue].
+   * [:start + length - 1:]. The entries are filled with [fill].
    * Throws an [UnsupportedError] if the list is
    * not extendable.
    * If [length] is 0, this method does not do anything.
@@ -177,16 +189,28 @@ interface List<E> extends Collection<E>, Sequence<E>
    * Throws an [RangeError] if [start] is negative or if
    * [start] is greater than the length of the list.
    */
-  void insertRange(int start, int length, [E initialValue]);
+  void insertRange(int start, int length, [E fill]);
 }
 
 class _ListImpl<E> {
   /**
    * Factory implementation of List().
    *
-   * Creates a list of the given [length].
+   * Creates an extendable list of the given [length].
+   */
+  external factory List([int length = 0]);
+
+  /**
+   * Creates a fixed-sized list of the given [length] where each entry is
+   * filled with [fill].
+   */
+  external factory List.fixedLength(int length, {E fill: null});
+
+  /**
+   * Creates an extendable list of the given [length] where each entry is
+   * filled with [fill].
    */
-  external factory List([int length]);
+  external factory List.filled(int length, E fill);
 
   /**
    * Factory implementation of List.from().