Added support for re-running of layout tests form the dashboard.

LayoutTests/fast/harness/resources/archived-results-dashboard-test.js

 if (window.testRunner)
     testRunner.dumpAsText();
 
 var testStyles = document.createElement('style');
 testStyles.innerText = ".test-pass { color: green; } .test-fail { color: red; }";
 document.querySelector('head').appendChild(testStyles);
 
 var g_testIndex = 0;
 var g_log = ["You should see a series of PASS lines."];
 function mockResults()
@@ skipping 52 matching lines @@
     results.result_links.push('dir3/results.html');
     results.tests['foo-1.html'] = mockArchivedResults(['PASS', 'FAIL', 'SKIP']);
     results.tests['foo-2.html'] = mockArchivedResults(['FAIL', 'PASS', 'PASS']);
     var subtree = results.tests["virtual"] = {};
     subtree["foo-3.html"] = mockArchivedResults(['SKIP', 'PASS', 'SKIP']);
 
     var result = '';
     runTest(results, function() {
         var table = document.getElementById('results-table');
         assertTrue(table.rows.length == 4);
-        assertTrue(table.rows[0].cells.length == 4);
-        assertTrue(table.rows[1].cells[0].innerHTML == 'foo-1.html');
-        assertTrue(table.rows[3].cells[0].innerHTML == 'virtual/foo-3.html');
-        assertTrue(table.rows[1].cells[1].className == 'test-pass');
-        assertTrue(table.rows[1].cells[2].className == 'test-fail');
-        assertTrue(table.rows[1].cells[3].className == 'test-skip');
+        assertTrue(table.rows[0].cells.length == 5);
+        assertTrue(table.rows[1].cells[1].innerHTML == 'foo-1.html');
+        assertTrue(table.rows[3].cells[1].innerHTML == 'virtual/foo-3.html');
+        assertTrue(table.rows[1].cells[2].className == 'test-pass');
+        assertTrue(table.rows[1].cells[3].className == 'test-fail');
+        assertTrue(table.rows[1].cells[4].className == 'test-skip');
         var row = table.rows[1];
         var dummyhref = document.createElement("a");
         dummyhref.href = 'dir1/results.html';
-        assertTrue(row.cells[1].getElementsByTagName('a')[0] == dummyhref.href);
+        assertTrue(row.cells[2].getElementsByTagName('a')[0] == dummyhref.href);
         dummyhref.href = 'dir2/results.html';
-        assertTrue(row.cells[2].getElementsByTagName('a')[0] == dummyhref.href);
+        assertTrue(row.cells[3].getElementsByTagName('a')[0] == dummyhref.href);
         dummyhref.href = 'dir3/results.html';
-        assertTrue(row.cells[3].getElementsByTagName('a')[0] == dummyhref.href);
+        assertTrue(row.cells[4].getElementsByTagName('a')[0] == dummyhref.href);
     });
     document.body.innerHTML = '<pre>' + g_log.join('\n') + '</pre>';
 }
 
 var originalGeneratePage = generatePage;
 generatePage = runTests;