Remove List.copyFrom from VM and from tests. It was removed from the List interface in r941.

tests/corelib/growable_object_array2_vm_test.dart

 // Copyright (c) 2011, 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.
 // Test GrowableArray.dart.
 
 #library("GrowableObjectArray2Test.dart");
 #import("dart:coreimpl");
 
 class GrowableObjectArray2Test {
   static testMain() {
@@ skipping 11 matching lines @@
     Expect.equals(1001, g.last());
     Expect.equals(1001, g.removeLast());
     Expect.equals(100, g.length);
 
     var f = new GrowableObjectArray();
     var list = new List(20);
     for (int i = 0; i < list.length; i++) {
       f.add(2);
       list[i] = 5;
     }
-    list.copyFrom(f, 0, 0, f.length);
+    list.setRange(0, f.length, f, 0);
     for (int i = 0; i < f.length; i++) {
       Expect.equals(2, list[i]);
     }
-    f.copyFrom(g, 10, 0, 2);
+    f.setRange(0, 2, g, 10);
     Expect.equals(20, f.length);
 
     bool exceptionCaught = false;
     try {
       var elem = g[g.length];
     } catch (IndexOutOfRangeException e) {
       exceptionCaught = true;
     }
     Expect.equals(true, exceptionCaught);
 
@@ skipping 18 matching lines @@
     h.clear();
     List array = const [0, 1, 2, 3, 4];
     h.addAll(array);
     Expect.equals(5, h.length);
   }
 }
 
 main() {
   GrowableObjectArray2Test.testMain();
 }