Revert of Serve mojo WebUI resources from the same origin as the WebUI itself.

content/test/data/web_ui_mojo_shell_test.js

Index: content/test/data/web_ui_mojo_shell_test.js
diff --git a/content/test/data/web_ui_mojo_shell_test.js b/content/test/data/web_ui_mojo_shell_test.js
index d1b35dc1ad11ab1b6dcbe6fdc3175d11c8421d47..1ed359933313cbaf90c48d6188b4ca0f79c031b7 100644
--- a/content/test/data/web_ui_mojo_shell_test.js
+++ b/content/test/data/web_ui_mojo_shell_test.js
@@ -35,8 +35,9 @@
         function (services) {
           var test = connectToService(services, testMojom.TestMojoService);
           test.getRequestorURL().then(function(response) {
-            domAutomationController.send(
-                response.url == 'chrome://mojo-web-ui/');
+            // The requestor URL seen by the app should be localhost because the
+            // connection comes from this script hosted on the test server.
+            domAutomationController.send(response.url == 'http://127.0.0.1/');
           });
         },
         function (exposedServices) {});