Pass in "mode" to transformer plugins.

sdk/lib/_internal/pub/lib/src/barback.dart

Index: sdk/lib/_internal/pub/lib/src/barback.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback.dart b/sdk/lib/_internal/pub/lib/src/barback.dart
index 84a069a3f28086e285a145dbb5a8691f8437c6fe..9d20198e747d3794854c0f8831a4091c3b12f4d8 100644
--- a/sdk/lib/_internal/pub/lib/src/barback.dart
+++ b/sdk/lib/_internal/pub/lib/src/barback.dart
@@ -108,6 +108,7 @@ class TransformerId {
 /// monitor the app and its dependencies for any updates. Otherwise the state of
 /// the app when the server is started will be maintained.
 Future<BarbackServer> createServer(String host, int port, PackageGraph graph,
+    BarbackMode mode,

[nweiz, 2013/10/31 00:24:41]

Formatting nit: normally when formatting parameters we put them together on
lines as though the "{}" and "[]" for named/optional parameters weren't there,
or else we put each parameter on its own line (again as though the brackets
weren't there). This parameter list should follow one of those two patterns.

[Bob Nystrom, 2013/10/31 01:51:19]

Done. I think. I'm not really sure what the best style is here.

     {Iterable<Transformer> builtInTransformers, bool watchForUpdates: true}) {
   var provider = new PubPackageProvider(graph);
   var barback = new Barback(provider);
@@ -140,7 +141,7 @@ Future<BarbackServer> createServer(String host, int port, PackageGraph graph,
         })
       ];
 
-      loadAllTransformers(server, graph, builtInTransformers).then((_) {
+      loadAllTransformers(server, graph, mode, builtInTransformers).then((_) {
         if (!completer.isCompleted) completer.complete(server);
       }).catchError((error, stackTrace) {
         if (!completer.isCompleted) completer.completeError(error, stackTrace);