Remove use of wdiff from layout test runner.

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

Index: third_party/WebKit/LayoutTests/fast/harness/resources/results-test.js
diff --git a/third_party/WebKit/LayoutTests/fast/harness/resources/results-test.js b/third_party/WebKit/LayoutTests/fast/harness/resources/results-test.js
index 2d06f3911d1fb6324fd7ae6770219ee2c73236cf..2d01864075b00a34b0f7c0bf585d3ae797a06f26 100644
--- a/third_party/WebKit/LayoutTests/fast/harness/resources/results-test.js
+++ b/third_party/WebKit/LayoutTests/fast/harness/resources/results-test.js
@@ -27,7 +27,6 @@ function mockResults()
         "fixable": 0,
         "num_flaky": 0,
         "layout_tests_dir": "/WEBKITROOT",
-        "has_wdiff": false,
         "chromium_revision": 12345,
         "pixel_tests_enabled": true
     };
@@ -351,15 +350,6 @@ function runTests()
 
     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');