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 193e3221a5f12adc3b79298dc667bd8fdffd0807..b6db278794935a6076ce6f63e97788dca7093a4b 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}');
+      headers: headers, body: 'Hello from ${request.requestedUri.path}');
 }
 
 /// Calls [syncHandler] and wraps the response in a [Future].