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

tests/compiler/dart2js/value_range_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'compiler_helper.dart';
 
 const int REMOVED = 0;
 const int ABOVE_ZERO = 1;
 const int BELOW_LENGTH = 2;
 const int KEPT = 3;
@@ skipping 22 matching lines @@
   }
   return sum;
 }
 """,
 ABOVE_ZERO,
 
 """
 main(check) {
   // Make sure value is an int.
   var value = check ? 42 : 54;
-  var a = new List.fixedLength(value);
+  var a = new List(value);
   var sum = 0;
   for (int i = 0; i < value; i++) {
     sum += a[i];
   }
   return sum;
 }
 """,
 REMOVED,
 
 """
 main() {
   var a = new List();
   return a[0];
 }
 """,
 KEPT,
 
 """
 main() {
   var a = new List();
   return a.removeLast();
 }
 """,
 KEPT,
 
 """
 main() {
-  var a = new List.fixedLength(4);
+  var a = new List(4);
   return a[0];
 }
 """,
 REMOVED,
 
 """
 main() {
-  var a = new List.fixedLength(4);
+  var a = new List(4);
   return a.removeLast();
 }
 """,
 REMOVED,
 
 """
 main(value) {
-  var a = new List.fixedLength(value);
+  var a = new List(value);
   return a[value];
 }
 """,
 KEPT,
 
 """
 main(value) {
-  var a = new List.fixedLength(1024);
+  var a = new List(1024);
   return a[1023 & value];
 }
 """,
 REMOVED,
 
 """
 main(value) {
-  var a = new List.fixedLength(1024);
+  var a = new List(1024);
   return a[1024 & value];
 }
 """,
 ABOVE_ZERO,
 
 """
 main(value) {
   var a = new List();
   return a[1];
 }
@@ skipping 91 matching lines @@
   print(var obj) {}
   abstract class num {}
   abstract class int extends num { }
   abstract class double extends num { }
   class bool {}
   class String {}
   class Object {}
   class Type {}
   class Function {}
   class List {
-    List();
-    List.fixedLength(length);
+    List([int length]);
+    List.filled(int length, fill);
   }
   abstract class Map {}
   class Closure {}
   class Null {}
   class Dynamic_ {}
   bool identical(Object a, Object b) {}''';
 
 const String INTERCEPTORSLIB_WITH_MEMBERS = r'''
   class JSArray {
     var length;
@@ skipping 72 matching lines @@
       break;
   }
 }
 
 
 main() {
   for (int i = 0; i < TESTS.length;  i += 2) {
     expect(TESTS[i], TESTS[i + 1]);
   }
 }