Change new List(n) to return fixed length list.

tests/corelib/sort_helper.dart

Index: tests/corelib/sort_helper.dart
diff --git a/tests/corelib/sort_helper.dart b/tests/corelib/sort_helper.dart
index 85d0bee56416af975cc32bbe105981a62f1888cd..e37809746b670686e4031aa7f16ac078471d8748 100644
--- a/tests/corelib/sort_helper.dart
+++ b/tests/corelib/sort_helper.dart
@@ -23,7 +23,7 @@ class SortHelper {
   }
 
   void testSortIntLists() {
-    List a = new List.fixedLength(40);
+    List a = new List(40);
 
     for (int i = 0; i < a.length; i++) {
       a[i] = i;
@@ -79,10 +79,10 @@ class SortHelper {
     a[33] = 1;
     testSort(a);
 
-    var a2 = new List.fixedLength(0);
+    var a2 = new List(0);
     testSort(a2);
 
-    var a3 = new List.fixedLength(1);
+    var a3 = new List(1);
     a3[0] = 1;
     testSort(a3);
 
@@ -120,7 +120,7 @@ class SortHelper {
   }
 
   void testInsertionSort(int i1, int i2, int i3, int i4) {
-    var a = new List.fixedLength(4);
+    var a = new List(4);
     a[0] = i1;
     a[1] = i2;
     a[2] = i3;
@@ -129,7 +129,7 @@ class SortHelper {
   }
 
   void testSortDoubleLists() {
-    List a = new List.fixedLength(40);
+    List a = new List(40);
     for (int i = 0; i < a.length; i++) {
       a[i] = 1.0 * i + 0.5;
     }