Removed Polymer from Observatory deps

packages/web_components/lib/build/web_components.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// Transformer used for pub serve and pub build
 library web_components.build.web_components;
 
 import 'dart:async';
 import 'package:barback/barback.dart';
 import 'package:code_transformers/assets.dart';
@@ skipping 41 matching lines @@
   final Resolvers _resolvers;
   TransformOptions options;
 
   WebComponentsTransformer(this.options)
       : _resolvers = new Resolvers.fromMock(dart_sdk.mockSdkSources);
 
   bool isPrimary(AssetId id) {
     if (options.entryPoints != null) {
       return options.entryPoints.contains(id.path);
     }
-    if (id.path == 'web/index.bootstrap.dart') return true;
     // If no entry point is supplied, then any html file under web/ or test/ is
     // an entry point.
     return (id.path.startsWith('web/') || id.path.startsWith('test/')) &&
         id.path.endsWith('.html');
   }
 
   Future apply(Transform transform) {
     var logger = new BuildLogger(transform);
     var primaryInput = transform.primaryInput;
     return primaryInput.readAsString().then((html) {
@@ skipping 11 matching lines @@
             resolver, transform, doc, scriptId, newScriptId);
 
         // Swap out the main script tag for the bootstrap version.
         mainScriptTag.attributes['src'] = path.url.relative(bootstrap.id.path,
             from: path.url.dirname(primaryInput.id.path));
 
         // Output the new document and bootstrap file.
         transform
             .addOutput(new Asset.fromString(primaryInput.id, doc.outerHtml));
         transform.addOutput(bootstrap);
+        resolver.release();
       });
     });
   }
 }