Remove use of wdiff from layout test runner.

third_party/WebKit/LayoutTests/fast/harness/resources/results-test.js

 // To run these tests, load results.html in a browser.
 // You should see a series of PASS lines.
 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."];
 
 // Make async actually be sync for the sake of simpler testing.
 function async(func, args)
 {
     func.apply(null, args);
 }
 
 function mockResults()
 {
     return {
         tests: {},
         "skipped": 0,
         "num_regressions": 0,
         "version": 0,
         "num_passes": 0,
         "fixable": 0,
         "num_flaky": 0,
         "layout_tests_dir": "/WEBKITROOT",
-        "has_wdiff": false,
         "chromium_revision": 12345,
         "pixel_tests_enabled": true
     };
 }
 
 function isFailureExpected(expected, actual)
 {
     var isExpected = true;
     if (actual != 'SKIP') {
         var expectedArray = expected.split(' ');
@@ skipping 303 matching lines @@
 
     results = mockResults();
     var subtree = results.tests['foo'] = {}
     subtree['bar.html'] = mockExpectation('TEXT', 'TEXT');
     runTest(results, function() {
         assertTrue(document.querySelector('tbody td:nth-child(2)').textContent.indexOf('pretty diff') != -1);
     });
 
     results = mockResults();
     var subtree = results.tests['foo'] = {}
-    subtree['bar.html'] = mockExpectation('TEXT', 'TEXT');
-    results.has_wdiff = true;
-    runTest(results, function() {
-        assertTrue(document.querySelector('tbody td:nth-child(2)').textContent.indexOf('wdiff') != -1);
-
-    });
-
-    results = mockResults();
-    var subtree = results.tests['foo'] = {}
     subtree['bar.html'] = mockExpectation('TEXT', 'PASS');
     subtree['bar-1.html'] = mockExpectation('TEXT', 'CRASH');
     subtree['bar-5.html'] = mockExpectation('TEXT', 'IMAGE+TEXT');
     subtree['bar-3.html'] = mockExpectation('PASS', 'TEXT');
     subtree['bar-2.html'] = mockExpectation('PASS', 'IMAGE');
     runTest(results, function() {
         // FIXME: This just ensures we don't get a JS error.
         // Verify that the sort is correct and that inline expanded expectations
         // move along with the test they're attached to.
         TableSorter.sortColumn(0);
@@ skipping 428 matching lines @@
     results.tests['foo'].has_repaint_overlay = true;
     runTest(results, function() {
         assertTrue(document.querySelector('tbody td:nth-child(2)').textContent.indexOf('overlay') != -1);
     })
 
     document.body.innerHTML = '<pre>' + g_log.join('\n') + '</pre>';
 }
 
 var originalGeneratePage = generatePage;
 generatePage = runTests;