Introduce Origin-Trial for Service Worker Navigation Preload

third_party/WebKit/LayoutTests/http/tests/serviceworker/chromium/resources/get-interface-names.js

+function get_interface_names(global_object, interface_names) {
+  var result = [];
+  function collect_property_info(object, property_name, output) {
+    var descriptor = Object.getOwnPropertyDescriptor(object, property_name);
+    if ('value' in descriptor) {
+      if (typeof descriptor.value === 'function') {
+        output.push(' method ' + property_name);
+      } else {
+        output.push(' attribute ' + property_name);
+      }
+    } else {
+      if (descriptor.get) {
+        output.push(' getter ' + property_name);
+      }
+      if (descriptor.set) {
+        output.push(' setter ' + property_name);
+      }
+    }
+  }
+  interface_names.sort();
+  interface_names.forEach(function(interface_name) {
+    if (this[interface_name] === undefined) {
+      return;
+    }
+    result.push('interface ' + interface_name);
+    var property_names =
+        Object.getOwnPropertyNames(this[interface_name].prototype);
+    var property_strings = [];
+    property_names.forEach(function(property_name) {
+      collect_property_info(this[interface_name].prototype,
+                            property_name,
+                            property_strings);
+    });
+    result.push.apply(result, property_strings.sort());
+  });
+  return result.join("\n");;
+}