Control whether pub build and serve minify or not.

sdk/lib/_internal/pub/test/serve/utils.dart

Index: sdk/lib/_internal/pub/test/serve/utils.dart
diff --git a/sdk/lib/_internal/pub/test/serve/utils.dart b/sdk/lib/_internal/pub/test/serve/utils.dart
index 6ff10c0b74dad34081bc498c9293eba92851bfa2..1013aec04e2195e43f1b982221f1b38273b3b8ba 100644
--- a/sdk/lib/_internal/pub/test/serve/utils.dart
+++ b/sdk/lib/_internal/pub/test/serve/utils.dart
@@ -100,19 +100,17 @@ class DartTransformer extends Transformer {
 ///
 /// Returns the `pub serve` process.
 ScheduledProcess startPubServe({bool shouldGetFirst: false,
-    bool dart2js: true}) {
+    Iterable<String> args}) {
   // Use port 0 to get an ephemeral port.
-  var args = ["serve", "--port=0", "--hostname=127.0.0.1"];
+  var pubArgs = ["serve", "--port=0", "--hostname=127.0.0.1"];
 
-  if (!dart2js) args.add("--no-dart2js");
+  if (args != null) pubArgs.addAll(args);
 
   // Dart2js can take a long time to compile dart code, so we increase the
   // timeout to cope with that.
-  if (dart2js) {
-    currentSchedule.timeout = new Duration(seconds: 15);
-  }
+  currentSchedule.timeout = new Duration(seconds: 15);
 
-  _pubServer = startPub(args: args);
+  _pubServer = startPub(args: pubArgs);
 
   currentSchedule.onComplete.schedule(() {
     if (_webSocket != null) {