diff -r ef76fc2ac88c -r e4420d2515f1 org.chromium.sdk/src/org/chromium/sdk/JsArray.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/JsArray.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,41 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.sdk;
+
+import java.util.SortedMap;
+
+import org.chromium.sdk.internal.tools.v8.MethodIsBlockingException;
+
+/**
+ * This interface adds methods for handling array elements to the JsObject.
+ */
+public interface JsArray extends JsObject {
+
+  /**
+   * @return the array length (index of the last element plus one),
+   *         0 iff the array is empty
+   */
+  int length();
+
+  /**
+   * @param index in the array
+   * @return a {@code JsVariable} at the {@code index}, or {@code null} if there
+   *         is no value at the specified index in the array
+   * @throws MethodIsBlockingException if called from a callback because it may
+   *         need to load element data from remote
+   */
+  JsVariable get(int index) throws MethodIsBlockingException;
+
+  /**
+   * @return a map whose keys are array indices and values are {@code
+   *         JsVariable} instances found at the corresponding indices. The
+   *         resulting map is guaranteed to be sorted in the ascending key
+   *         order.
+   * @throws MethodIsBlockingException if called from a callback because
+   *         the method needs all elements loaded and might block until
+   *         it's done
+   */
+  SortedMap<Integer, ? extends JsVariable> toSparseArray() throws MethodIsBlockingException;
+}