Use caller's document url to resolve scriptURL/patternURL in registerServiceWorker/getRegistration

LayoutTests/http/tests/serviceworker/chromium/force-refresh-registration.html

Index: LayoutTests/http/tests/serviceworker/chromium/force-refresh-registration.html
diff --git a/LayoutTests/http/tests/serviceworker/chromium/force-refresh-registration.html b/LayoutTests/http/tests/serviceworker/chromium/force-refresh-registration.html
index 91cff70184f5ad3dadf57f38bd21b5a6abb62b3d..a1bc0648f2ecb7b06aa7d3588e9e20b7342c6452 100644
--- a/LayoutTests/http/tests/serviceworker/chromium/force-refresh-registration.html
+++ b/LayoutTests/http/tests/serviceworker/chromium/force-refresh-registration.html
@@ -11,10 +11,10 @@ async_test(function(t) {
     with_iframe('../resources/blank.html')
       .then(t.step_func(function(frame) {
           var p = new Promise(function(resolve) {
-              // Override onload handler assigned by with_iframe. 
+              // Override onload handler assigned by with_iframe.
               frame.onload = t.step_func(function() {
                   resolve(frame.contentWindow.navigator.serviceWorker.register(
-                      'empty-worker.js',
+                      '../resources/empty-worker.js',
                       {scope: scope}));
               });
           });