Change getRange to sublist. Make getRange deprecated.

sdk/lib/_collection_dev/list.dart

Index: sdk/lib/_collection_dev/list.dart
diff --git a/sdk/lib/_collection_dev/list.dart b/sdk/lib/_collection_dev/list.dart
index 7ae5abf93c8df7becb00b5d598a864d65c2ab5d9..01c7e8ad883803f9dc97b4902acc3f52508599c5 100644
--- a/sdk/lib/_collection_dev/list.dart
+++ b/sdk/lib/_collection_dev/list.dart
@@ -29,20 +29,24 @@ abstract class ListBase<E> extends ListIterable<E> implements List<E> {
     return new ListMapView(this);
   }
 
-  List<E> getRange(int start, int length) {
+  List<E> sublist(int start, [int end]) {
+    if (end == null) end = length;
     if (start < 0 || start > this.length) {
       throw new RangeError.range(start, 0, this.length);
     }
-    if (length < 0 || start + length > this.length) {
-      throw new RangeError.range(length, 0, this.length - start);
+    if (end < start || end > this.length) {
+      throw new RangeError.range(end, start, this.length);
     }
-    List<E> result = new List<E>(length);
+    int length = end - start;
+    List<E> result = new List<E>()..length = length;
     for (int i = 0; i < length; i++) {
       result[i] = this[start + i];
     }
     return result;
   }
 
+  List<E> getRange(int start, int length) => sublist(start, start + length);
+
   int indexOf(E element, [int start = 0]) {
     return Arrays.indexOf(this, element, start, this.length);
   }