update to polymer js 0.5.1

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

Index: pkg/polymer/lib/src/build/polyfill_injector.dart
diff --git a/pkg/polymer/lib/src/build/polyfill_injector.dart b/pkg/polymer/lib/src/build/polyfill_injector.dart
index 2dc3b326f143c6f8022e67e3ee26d0eebf3dc7fa..a675aa7ff0a85ae664085def5c064ccac0022d1c 100644
--- a/pkg/polymer/lib/src/build/polyfill_injector.dart
+++ b/pkg/polymer/lib/src/build/polyfill_injector.dart
@@ -38,7 +38,7 @@ class PolyfillInjector extends Transformer with PolymerTransformer {
         detailsUri: 'http://goo.gl/5HPeuP');
     return readPrimaryAsHtml(transform, logger).then((document) {
       bool dartSupportFound = false;
-      Element platformJs;
+      Element webComponentsJs;
       Element dartJs;
       final dartScripts = <Element>[];
 
@@ -46,8 +46,12 @@ class PolyfillInjector extends Transformer with PolymerTransformer {
         var src = tag.attributes['src'];
         if (src != null) {
           var last = src.split('/').last;
-          if (_platformJS.hasMatch(last)) {
-            platformJs = tag;
+          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 (last == 'dart.js') {
@@ -98,24 +102,24 @@ class PolyfillInjector extends Transformer with PolymerTransformer {
       }
 
       // Inserts dart_support.js either at the top of the document or directly
-      // after platform.js if it exists.
+      // after webcomponents.js if it exists.
       if (!dartSupportFound) {
-        if (platformJs == null) {
+        if (webComponentsJs == null) {
           _addScriptFirst('web_components/dart_support.js');
         } else {
-          var parentsNodes = platformJs.parentNode.nodes;
+          var parentsNodes = webComponentsJs.parentNode.nodes;
           parentsNodes.insert(
-              parentsNodes.indexOf(platformJs) + 1,
+              parentsNodes.indexOf(webComponentsJs) + 1,
               parseFragment(
                   '\n<script src="packages/web_components/dart_support.js">'
                   '</script>'));
         }
       }
 
-      // By default platform.js should come before all other scripts.
-      if (platformJs == null && options.injectPlatformJs) {
-        var suffix = options.releaseMode ? '.js' : '.concat.js';
-        _addScriptFirst('web_components/platform$suffix');
+      // By default webcomponents.js should come before all other scripts.
+      if (webComponentsJs == null && options.injectWebComponentsJs) {
+        var suffix = options.releaseMode ? '.min.js' : '.js';
+        _addScriptFirst('web_components/webcomponents$suffix');
       }
 
       transform.addOutput(
@@ -125,4 +129,6 @@ class PolyfillInjector extends Transformer with PolymerTransformer {
 }
 
 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);