Move sort to collection-dev and remove coreSort.

sdk/lib/collection/collections.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.
 
 part of dart.collection;
 
 /**
  * This class provides default implementations for Iterables (including Lists).
  *
  * Once Dart receives Mixins it will be replaced with mixin classes.
@@ skipping 287 matching lines @@
 
   static List skipList(List list, int n) {
     // The generic type is currently lost. It will be fixed with mixins.
     return new ListView(list, n, null);
   }
 
   static Iterable skipWhile(Iterable iterable, bool test(var value)) {
     // The generic type is currently lost. It will be fixed with mixins.
     return new SkipWhileIterable(iterable, test);
   }
+
+  static void sortList(List l, int compare(a, b)) {
+    if (compare == null) compare = Comparable.compare;
+    _Sort.sort(l, compare);
+  }
 }
 
 /**
  * The [Collections] class implements static methods useful when
  * writing a class that implements [Collection] and the [iterator]
  * method.
  */
 class Collections {
   /** Deprecated. Use the same method in [IterableMixinWorkaround] instead.*/
   static bool contains(Iterable iterable, var element)
@@ skipping 193 matching lines @@
    * Returns true if the specified collection contains the specified object
    * reference.
    */
   static _containsRef(Collection c, Object ref) {
     for (var e in c) {
       if (identical(e, ref)) return true;
     }
     return false;
   }
 }