Removed Polymer from Observatory deps

packages/polymer/lib/src/build/polyfill_injector.dart

-// Copyright (c) 2013, 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.
-
-/// Includes any additional polyfills that may needed by the deployed app.
-library polymer.src.build.polyfill_injector;
-
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-import 'package:html/dom.dart'
-    show Document, DocumentFragment, Element, Node;
-import 'package:html/parser.dart' show parseFragment;
-import 'package:code_transformers/messages/build_logger.dart';
-import 'package:path/path.dart' as path;
-import 'package:web_components/transformer.dart' show testAttribute;
-import 'common.dart';
-
-/// Ensures that any scripts and polyfills needed to run a polymer application
-/// are included.
-///
-/// This step also replaces "packages/browser/dart.js" and the Dart script tag
-/// with a script tag that loads the dart2js compiled code directly.
-class PolyfillInjector extends Transformer with PolymerTransformer {
-  final TransformOptions options;
-
-  PolyfillInjector(this.options);
-
-  /// Only run on entry point .html files.
-  bool isPrimary(AssetId id) => options.isHtmlEntryPoint(id);
-
-  Future apply(Transform transform) {
-    var logger = new BuildLogger(transform,
-        convertErrorsToWarnings: !options.releaseMode,
-        detailsUri: 'http://goo.gl/5HPeuP');
-    return readPrimaryAsHtml(transform, logger).then((document) {
-      bool dartSupportFound = false;
-      Element webComponentsJs;
-      Element dartJs;
-      final dartScripts = <Element>[];
-
-      for (var tag in document.querySelectorAll('script')) {
-        var src = tag.attributes['src'];
-        if (src != null) {
-          var last = src.split('/').last;
-          if (_webComponentsJS.hasMatch(last)) {
-            webComponentsJs = tag;
-          } else if (_platformJS.hasMatch(last)) {
-            tag.attributes['src'] =
-                src.replaceFirst(_platformJS, 'webcomponents.min.js');
-            webComponentsJs = tag;
-          } else if (_dartSupportJS.hasMatch(last)) {
-            dartSupportFound = true;
-          } else if (_browserDartJS.hasMatch(src)) {
-            dartJs = tag;
-          }
-        }
-
-        if (tag.attributes['type'] == 'application/dart') {
-          dartScripts.add(tag);
-        }
-      }
-
-      if (dartScripts.isEmpty) {
-        // This HTML has no Dart code, there is nothing to do here.
-        transform.addOutput(transform.primaryInput);
-        return;
-      }
-
-      // Remove "packages/browser/dart.js". It is not needed in release mode,
-      // and in debug mode we want to ensure it is the last script on the page.
-      if (dartJs != null) dartJs.remove();
-
-      // TODO(jmesserly): ideally we would generate an HTML that loads
-      // dart2dart too. But for now dart2dart is not a supported deployment
-      // target, so just inline the JS script. This has the nice side effect of
-      // fixing our tests: even if content_shell supports Dart VM, we'll still
-      // test the compiled JS code.
-      if (options.directlyIncludeJS) {
-        // Replace all other Dart script tags with JavaScript versions.
-        for (var script in dartScripts) {
-          /// Don't modify scripts that were originally <link rel="x-test-dart">
-          /// tags.
-          if (script.attributes.containsKey(testAttribute)) continue;
-
-          final src = script.attributes['src'];
-          if (src.endsWith('.dart')) {
-            script.attributes.remove('type');
-            script.attributes['src'] = '$src.js';
-            // TODO(sigmund): we shouldn't need 'async' here. Remove this
-            // workaround for dartbug.com/19653.
-            script.attributes['async'] = '';
-          }
-        }
-      } else {
-        document.body.nodes.add(
-            parseFragment('<script src="packages/browser/dart.js"></script>'));
-      }
-
-      _addScript(urlSegment, [Element parent, int position]) {
-        if (parent == null) parent = document.head;
-        // Default to either the top of `parent` or right after the <base> tag.
-        if (position == null) {
-          var base = parent.querySelector('base');
-          if (base != null) {
-            position = parent.nodes.indexOf(base) + 1;
-          } else {
-            position = 0;
-          }
-        }
-        var pathToPackages =
-            '../' * (path.url.split(transform.primaryInput.id.path).length - 2);
-        parent.nodes.insert(position, parseFragment(
-            '<script src="${pathToPackages}packages/$urlSegment"></script>'));
-      }
-
-      // Inserts dart_support.js either at the top of the document or directly
-      // after webcomponents.js if it exists.
-      if (!dartSupportFound) {
-        if (webComponentsJs == null) {
-          _addScript('web_components/dart_support.js');
-        } else {
-          var parentNode = webComponentsJs.parentNode;
-          _addScript('web_components/dart_support.js', parentNode,
-              parentNode.nodes.indexOf(webComponentsJs) + 1);
-        }
-      }
-
-      // By default webcomponents.js should come before all other scripts.
-      if (webComponentsJs == null && options.injectWebComponentsJs) {
-        var suffix = options.releaseMode ? '.min.js' : '.js';
-        _addScript('web_components/webcomponents$suffix');
-      }
-
-      transform.addOutput(
-          new Asset.fromString(transform.primaryInput.id, document.outerHtml));
-    });
-  }
-}
-
-final _platformJS = new RegExp(r'platform.*\.js', caseSensitive: false);
-final _webComponentsJS =
-    new RegExp(r'webcomponents.*\.js', caseSensitive: false);
-final _dartSupportJS = new RegExp(r'dart_support.js', caseSensitive: false);
-final _browserDartJS =
-    new RegExp(r'packages/browser/dart.js', caseSensitive: false);