Small crash fix for set pages dialog drag'n'drop issue.

chrome/browser/ui/webui/options/options_browsertest.js

 // Copyright (c) 2012 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.
 
 GEN('#include "chrome/browser/ui/webui/options/options_browsertest.h"');
 
 /**
  * Wait for the global window.onpopstate callback to be called (after a tab
  * history navigation), then execute |afterFunction|.
  */
@@ skipping 243 matching lines @@
     'bubbles': true,
     'cancelable': true,
     'keyIdentifier': 'Enter'
   });
   assertFalse(event.defaultPrevented);
   page.pageDiv.dispatchEvent(event);
   assertTrue(event.defaultPrevented);
   testDone();
 });
 
+// Verifies that sending an empty list of indexes to move doesn't crash chrome.
+TEST_F('OptionsWebUITest', 'emptySelectedIndexesDoesntCrash', function() {
+  chrome.send('dragDropStartupPage', [0, []]);
+  setTimeout(testDone);
+});
+
 /**
  * TestFixture for OptionsPage WebUI testing including tab history.
  * @extends {testing.Test}
  * @constructor
  */
 function OptionsWebUINavigationTest() {}
 
 OptionsWebUINavigationTest.prototype = {
   __proto__: testing.Test.prototype,
 
@@ skipping 424 matching lines @@
   OptionsPage.navigateToPage('searchEngines');
   expectNotEquals(loc, location.href);
 
   document.documentElement.classList.remove('loading');
   assertFalse(OptionsPage.isLoading());
   OptionsPage.showDefaultPage();
   expectEquals(loc, location.href);
 
   testDone();
 });