Enables codegen support in polymer

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

Index: pkg/polymer/lib/src/build/linter.dart
diff --git a/pkg/polymer/lib/src/build/linter.dart b/pkg/polymer/lib/src/build/linter.dart
index df3331894f2c75ef5e23101a4813aaec30335ca3..9a7b8c5e269bbf04864fb069f65f2284c50d4f3a 100644
--- a/pkg/polymer/lib/src/build/linter.dart
+++ b/pkg/polymer/lib/src/build/linter.dart
@@ -214,14 +214,14 @@ class _LinterVisitor extends TreeVisitor {
       _logger.error('Missing tag name of the custom element. Please include an '
           'attribute like \'name="your-tag-name"\'.',
           span: node.sourceSpan);
-    } else if (!_isCustomTag(tagName)) {
+    } else if (!isCustomTagName(tagName)) {
       _logger.error('Invalid name "$tagName". Custom element names must have '
           'at least one dash and can\'t be any of the following names: '
-          '${_invalidTagNames.keys.join(", ")}.',
+          '${invalidTagNames.keys.join(", ")}.',
           span: node.sourceSpan);
     }
 
-    if (_elements[extendsTag] == null && _isCustomTag(extendsTag)) {
+    if (_elements[extendsTag] == null && isCustomTagName(extendsTag)) {
       _logger.warning('custom element with name "$extendsTag" not found.',
           span: node.sourceSpan);
     }
@@ -299,7 +299,7 @@ class _LinterVisitor extends TreeVisitor {
     var nodeTag = node.localName;
     var hasIsAttribute;
     var customTagName;
-    if (_isCustomTag(nodeTag)) {
+    if (isCustomTagName(nodeTag)) {
       // <fancy-button>
       customTagName = nodeTag;
       hasIsAttribute = false;
@@ -387,27 +387,6 @@ class _LinterVisitor extends TreeVisitor {
   }
 }
 
-
-// These names have meaning in SVG or MathML, so they aren't allowed as custom
-// tags.
-var _invalidTagNames = const {
-  'annotation-xml': '',
-  'color-profile': '',
-  'font-face': '',
-  'font-face-src': '',
-  'font-face-uri': '',
-  'font-face-format': '',
-  'font-face-name': '',
-  'missing-glyph': '',
-};
-
-/// Returns true if this is a valid custom element name. See:
-/// <https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/custom/index.html#dfn-custom-element-name>
-bool _isCustomTag(String name) {
-  if (name == null || !name.contains('-')) return false;
-  return !_invalidTagNames.containsKey(name);
-}
-
 const String USE_INIT_DART =
     'To run a polymer application, you need to call "initPolymer". You can '
     'either include a generic script tag that does this for you:'