Removing polymer-specific code from barback runner

pkg/polymer/lib/builder.dart

Index: pkg/polymer/lib/builder.dart
diff --git a/pkg/polymer/lib/builder.dart b/pkg/polymer/lib/builder.dart
index 12b8a930b91838b61fdaaf36c1e0d1108143619c..64d06e93ac0ac82a196df0be733afc1e9d50fe99 100644
--- a/pkg/polymer/lib/builder.dart
+++ b/pkg/polymer/lib/builder.dart
@@ -191,10 +191,11 @@ Future deploy({List<String> entryPoints, CommandLineOptions options,
       contentSecurityPolicy: options.contentSecurityPolicy,
       releaseMode: options.releaseMode);
 
+  var phases = new PolymerTransformerGroup(transformOptions).phases;
   var barbackOptions = new BarbackOptions(
-      new PolymerTransformerGroup(transformOptions).phases,
-      options.outDir, currentPackage: currentPackage,
-      packageDirs: packageDirs, machineFormat: options.machineFormat);
+      phases, options.outDir, currentPackage: currentPackage,
+      packageDirs: packageDirs, machineFormat: options.machineFormat,
+      packagePhases: {'polymer' : phasesForPolymer});
   return runBarback(barbackOptions)
       .then((_) => print('Done! All files written to "${options.outDir}"'));
 }