Prune the old deploy code. This CL does a few changes:

pkg/polymer/lib/deploy.dart

Index: pkg/polymer/lib/deploy.dart
diff --git a/pkg/polymer/lib/deploy.dart b/pkg/polymer/lib/deploy.dart
index 86f157ba1ee3dd7cf3e8408fee8279ca9887b854..4fd9fa6cbafe3d3722da9c45e1c5ccdc519f934a 100644
--- a/pkg/polymer/lib/deploy.dart
+++ b/pkg/polymer/lib/deploy.dart
@@ -26,17 +26,32 @@ import 'package:yaml/yaml.dart';
 import 'package:args/args.dart';
 
 main() {
-  var args = _parseArgs();
+  var args = _parseArgs(new Options().arguments);
   if (args == null) return;
   print('polymer/deploy.dart: creating a deploy target for "$_currentPackage"');
+  var outDir = args['out'];
+  _run(args['webdir'], outDir).then(
+      (_) => print('Done! All files written to "$outDir"'));
+}
+
+/**
+ * API exposed for testing purposes. Runs this deploy command but prentend that
+ * the sources under [webDir] belong to package 'test'.
+ */
+Future runForTest(String webDir, String outDir) {
+  _currentPackage = 'test';
+  return _run(webDir, outDir);
+}
+
+Future _run(String webDir, String outDir) {
   var barback = new Barback(new _PolymerDeployProvider());
-  _initializeBarback(barback);
+  _initializeBarback(barback, webDir);
   _attachListeners(barback);
-  _emitAllFiles(barback, args['out']);
+  return _emitAllFiles(barback, webDir, outDir);
 }
 
 /** Tell barback which transformers to use and which assets to process. */
-void _initializeBarback(Barback barback) {
+void _initializeBarback(Barback barback, String webDir) {
   var assets = [];
   for (var package in _packageDirs.keys) {
     // Do not process packages like 'polymer' where there is nothing to do.
@@ -54,7 +69,7 @@ void _initializeBarback(Barback barback) {
   }
 
   // In case of the current package, include also 'web'.
-  for (var filepath in _listDir(_currentPackage, 'web')) {
+  for (var filepath in _listDir(_currentPackage, webDir)) {
     assets.add(new AssetId(_currentPackage, filepath));
   }
   barback.updateSources(assets);
@@ -100,17 +115,17 @@ void _ensureDir(var dirpath) {
  * Emits all outputs of [barback] and copies files that we didn't process (like
  * polymer's libraries).
  */
-Future _emitAllFiles(Barback barback, String outDir) {
+Future _emitAllFiles(Barback barback, String webDir, String outDir) {
   return barback.getAllAssets().then((assets) {
     // Copy all the assets we transformed
     var futures = [];
     for (var asset in assets) {
       var id = asset.id;
       var filepath;
-      if (id.package == _currentPackage && id.path.startsWith('web/')) {
+      if (id.package == _currentPackage && id.path.startsWith('$webDir/')) {
         filepath = path.join(outDir, id.path);
       } else if (id.path.startsWith('lib/')) {
-        filepath = path.join(outDir, 'web', 'packages', id.package,
+        filepath = path.join(outDir, webDir, 'packages', id.package,
             id.path.substring(4));
       } else {
         // TODO(sigmund): do something about other assets?
@@ -128,7 +143,7 @@ Future _emitAllFiles(Barback barback, String outDir) {
     for (var package in _ignoredPackages) {
       for (var relpath in _listDir(package, 'lib')) {
         var inpath = path.join(_packageDirs[package], relpath);
-        var outpath = path.join(outDir, 'web', 'packages', package,
+        var outpath = path.join(outDir, webDir, 'packages', package,
             relpath.substring(4));
         _ensureDir(path.dirname(outpath));
 
@@ -137,8 +152,7 @@ Future _emitAllFiles(Barback barback, String outDir) {
           .then((_) => writer.close()));
       }
     }
-    return Future.wait(futures)
-      .then((_) => print('Done! All files written to "$outDir"'));
+    return Future.wait(futures);
   });
 }
 
@@ -194,7 +208,7 @@ Map<String, String> _packageDirs = () {
  */
 // TODO(sigmund): consider computing this list by recursively parsing
 // pubspec.yaml files in the [_packageDirs].
-Set<String> _ignoredPackages =
+final Set<String> _ignoredPackages =
     (const [ 'analyzer_experimental', 'args', 'barback', 'browser', 'csslib',
              'custom_element', 'fancy_syntax', 'html5lib', 'html_import', 'js',
              'logging', 'mdv', 'meta', 'mutation_observer', 'observe', 'path',
@@ -203,14 +217,16 @@ Set<String> _ignoredPackages =
              'unmodifiable_collection', 'yaml'
            ]).toSet();
 
-ArgResults _parseArgs() {
+ArgResults _parseArgs(arguments) {
   var parser = new ArgParser()
       ..addFlag('help', abbr: 'h', help: 'Displays this help message',
           defaultsTo: false, negatable: false)
+      ..addOption('webdir', help: 'Directory containing the application',
+          defaultsTo: 'web')
       ..addOption('out', abbr: 'o', help: 'Directory where to generated files',
           defaultsTo: 'out');
   try {
-    var results = parser.parse(new Options().arguments);
+    var results = parser.parse(arguments);
     if (results['help']) {
       _showUsage(parser);
       return null;