Overhaul the semantics of Request.handlerPath and Request.url.

test/test_util.dart

Index: test/test_util.dart
diff --git a/test/test_util.dart b/test/test_util.dart
index 281989b364cc0e11cc7cc6a5e3ddd0b174f28296..bc0674860c44c59121cf8a7bbda5f0d796324764 100644
--- a/test/test_util.dart
+++ b/test/test_util.dart
@@ -23,7 +23,7 @@ Response syncHandler(Request request, {int statusCode,
     Map<String, String> headers}) {
   if (statusCode == null) statusCode = 200;
   return new Response(statusCode, headers: headers,
-      body: 'Hello from ${request.url.path}');
+      body: 'Hello from ${request.requestedUri.path}');
 }
 
 /// Calls [syncHandler] and wraps the response in a [Future].