Unify error messages for iterables and lists.

runtime/lib/growable_array.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.
 
 class _GrowableList<T> implements List<T> {
   static final int _classId = (new _GrowableList(0))._cid;
 
   void insert(int index, T element) {
     if (index < 0 || index > length) {
       throw new RangeError.range(index, 0, length);
@@ skipping 180 matching lines @@
   T removeLast() {
     var len = length - 1;
     var elem = this[len];
     this[len] = null;
     _setLength(len);
     return elem;
   }
 
   T get first {
     if (length > 0) return this[0];
-    throw new StateError("No elements");
+    throw IterableElementError.noElement();
   }
 
   T get last {
     if (length > 0) return this[length - 1];
-    throw new StateError("No elements");
+    throw IterableElementError.noElement();
   }
 
   T get single {
     if (length == 1) return this[0];
-    if (length == 0) throw new StateError("No elements");
-    throw new StateError("More than one element");
+    if (length == 0) throw IterableElementError.noElement();
+    throw IterableElementError.tooMany();;
   }
 
   int indexOf(Object element, [int start = 0]) {
     return IterableMixinWorkaround.indexOfList(this, element, start);
   }
 
   int lastIndexOf(Object element, [int start = null]) {
     return IterableMixinWorkaround.lastIndexOfList(this, element, start);
   }
 
@@ skipping 130 matching lines @@
   }
 
   Set<T> toSet() {
     return new Set<T>.from(this);
   }
 
   Map<int, T> asMap() {
     return IterableMixinWorkaround.asMapList(this);
   }
 }