Report w3c test result count for WPT

third_party/WebKit/LayoutTests/resources/testharnessreport.js

Index: third_party/WebKit/LayoutTests/resources/testharnessreport.js
diff --git a/third_party/WebKit/LayoutTests/resources/testharnessreport.js b/third_party/WebKit/LayoutTests/resources/testharnessreport.js
index 8086a623fa6e7a1a82319e64fd7149e35de0dbcb..c3d3ff941a35b01d183504af7ee8036ec0e77929 100644
--- a/third_party/WebKit/LayoutTests/resources/testharnessreport.js
+++ b/third_party/WebKit/LayoutTests/resources/testharnessreport.js
@@ -188,11 +188,24 @@
         } else {
             // Iterate through tests array and build string that contains
             // results for all tests.
+            let testResults = "";
+            let resultCounter = [0, 0, 0, 0];
             for (var i = 0; i < tests.length; ++i) {
-                resultStr += convertResult(tests[i].status) + " " +
+                resultCounter[tests[i].status]++;
+                testResults += convertResult(tests[i].status) + " " +
                     sanitize(tests[i].name) + " " +
                     sanitize(tests[i].message) + "\n";
             }
+            if (output_document.URL.indexOf("http://web-platform.test") >= 0 &&
+                tests.length >= 50 && (resultCounter[1] || resultCounter[2] || resultCounter[3])) {
+                // Output failure metrics if there are many.
+                resultStr += `Found ${tests.length} tests;` +
+                    ` ${resultCounter[0]} PASS,` +
+                    ` ${resultCounter[1]} FAIL,` +
+                    ` ${resultCounter[2]} TIMEOUT,` +
+                    ` ${resultCounter[3]} NOTRUN.\n`;
+            }
+            resultStr += testResults;
         }
 
         resultStr += "Harness: the test ran to completion.\n";