Migrate WebUSB LayoutTests into external/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 cbcfbe2ef00ba6b126a33e2f9f34f238cd51f102..e387a4190c3877f76a56ab534132eb6a21c2dd5b 100644
--- a/third_party/WebKit/LayoutTests/resources/testharnessreport.js
+++ b/third_party/WebKit/LayoutTests/resources/testharnessreport.js
@@ -78,9 +78,11 @@
 
     function isWPTManualTest() {
         var path = location.pathname;
-        if (location.hostname == 'web-platform.test' && path.endsWith('-manual.html'))
+        if (location.hostname == 'web-platform.test'
+            && /.*-manual(\.https)?\.html$/.test(path)) {
             return true;
-        return /\/external\/wpt\/.*-manual\.html$/.test(path);
+        }
+        return /\/external\/wpt\/.*-manual(\.https)?\.html$/.test(path);
     }
 
     // Returns a directory part relative to WPT root and a basename part of the
@@ -113,8 +115,10 @@
         }
 
         var src;
-        if (pathAndBase.startsWith('/fullscreen/')) {
-            // Fullscreen tests all use the same automation script.
+        if (pathAndBase.startsWith('/fullscreen/')
+            || pathAndBase.startsWith('/webusb/')) {
+            // Fullscreen tests all use the same automation script and WebUSB
+            // tests borrow it.
             src = automationPath + '/fullscreen/auto-click.js';
         } else if (pathAndBase.startsWith('/pointerevents/')
                    || pathAndBase.startsWith('/uievents/')) {
@@ -128,6 +132,40 @@
         document.head.appendChild(script);
     }
 
+    function importTestPolyfills() {
+        var pathAndBase = pathAndBaseNameInWPT();
+        if (!pathAndBase)
+            return;
+        var automationPath = location.pathname.replace(/\/external\/wpt\/.*$/, '/external/wpt_polyfill');
+        if (location.hostname == 'web-platform.test')
+            polyfillPath = '/wpt_polyfill';
+
+        var script = document.createElement('script');
+        if (pathAndBase.startsWith('/webusb/')) {
+            // WebUSB tests require a polyfill for navigator.usb.test. This
+            // script will be loaded asynchronously so we need to patch in
+            // a version of navigator.usb.test.initialize() that will wait for
+            // the script to load.
+            script.src = polyfillPath + '/webusb/webusb-test.js';
+            let initializePromise = null;
+            navigator.usb.test = {
+              initialize: function() {
+                if (!initializePromise) {
+                  initializePromise = new Promise(resolve => {
+                    script.onload = () => {
+                      resolve(navigator.usb.test.initialize());
+                    }
+                  });
+                }
+                return initializePromise;
+              }
+            };
+        } else {
+            return;
+        }
+        document.head.appendChild(script);
+    }
+
     var didDispatchLoadEvent = false;
     window.addEventListener('load', function() {
         didDispatchLoadEvent = true;
@@ -266,4 +304,5 @@
         }
     });
 
+    importTestPolyfills();
 })();