Change List constructors.

sdk/lib/_internal/compiler/implementation/lib/core_patch.dart

Index: sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
diff --git a/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart b/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
index f75c3d7998b56307202d4083157c04b84a5ecb0f..58e90165a07b9850d0a26e34773417167f6a6f2f 100644
--- a/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
+++ b/sdk/lib/_internal/compiler/implementation/lib/core_patch.dart
@@ -155,7 +155,42 @@ patch class _StopwatchImpl {
 
 // Patch for List implementation.
 patch class _ListImpl<E> {
-  patch factory List([int length]) => Primitives.newList(length);
+  patch factory List([int length = 0]) {
+    if ((length is !int) || (length < 0)) {
+      throw new ArgumentError("Length must be a positive integer: $length.");

[Lasse Reichstein Nielsen, 2012/11/12 11:31:06]

Use Error.safeToString on 'length' in case it's not an int.

[floitsch, 2012/11/12 13:21:50]

Done.

+    }
+    return Primitives.newGrowableList(length);
+  }
+
+  patch factory List.fixedLength(int length, {E fill: null}) {
+    if ((length is !int) || (length < 0)) {
+      throw new ArgumentError("Length must be a positive integer: $length.");
+    }
+    List result = Primitives.newFixedList(length);
+    if (length != 0 && fill != null) {
+      for (int i = 0; i < result.length; i++) {
+        result[i] = fill;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * Creates an extendable list of the given [length] where each entry is
+   * filled with [fill].
+   */
+  patch factory List.filled(int length, E fill) {
+    if ((length is !int) || (length < 0)) {
+      throw new ArgumentError("Length must be a positive integer: $length.");
+    }
+    List result = Primitives.newGrowableList(length);
+    if (length != 0 && fill != null) {
+      for (int i = 0; i < result.length; i++) {
+        result[i] = fill;
+      }
+    }
+    return result;
+  }
 
   patch factory List.from(Iterable<E> other) {
     var result = new List();