Make getter for capacity in _GrowableObjectArray private.

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 _GrowableObjectArray<T> implements List<T> {
   factory _GrowableObjectArray._uninstantiable() {
     throw new UnsupportedError(
         "GrowableObjectArray can only be allocated by the VM");
   }
 
@@ skipping 75 matching lines @@
     List<T> result = new _GrowableObjectArray<T>();
     result.addAll(other);
     return result;
   }
 
   factory _GrowableObjectArray.fromObjectArray(_ObjectArray<T> data)
     native "GrowableObjectArray_allocate";
 
   int get length native "GrowableObjectArray_getLength";
 
-  int get capacity native "GrowableObjectArray_getCapacity";
+  int get _capacity native "GrowableObjectArray_getCapacity";
 
   void set length(int new_length) {
-    if (new_length > capacity) {
+    if (new_length > _capacity) {
       _grow(new_length);
     } else {
       for (int i = new_length; i < length; i++) {
         this[i] = null;
       }
     }
     _setLength(new_length);
   }
 
   void _setLength(int new_length) native "GrowableObjectArray_setLength";
 
   void _setData(_ObjectArray<T> array) native "GrowableObjectArray_setData";
 
   T operator [](int index) native "GrowableObjectArray_getIndexed";
 
   void operator []=(int index, T value) native "GrowableObjectArray_setIndexed";
 
   // The length of this growable array. It is always less than or equal to the
   // length of the object array, which itself is always greater than 0, so that
   // grow() does not have to check for a zero length object array before
   // doubling its size.
   void add(T value) {
     var len = length;
-    if (len == capacity) {
+    if (len == _capacity) {
       _grow(len * 2);
     }
     _setLength(len + 1);
     this[len] = value;
   }
 
   void addLast(T element) {
     add(element);
   }
 
@@ skipping 83 matching lines @@
   }
 
   String toString() {
     return Collections.collectionToString(this);
   }
 
   Iterator<T> iterator() {
     return new SequenceIterator<T>(this);
   }
 }