Make source mirror ObjectMirror.getField synchronous

utils/apidoc/html_diff.dart

Index: utils/apidoc/html_diff.dart
diff --git a/utils/apidoc/html_diff.dart b/utils/apidoc/html_diff.dart
index 47f0ab5754fb73ed12b92460ea81b35cf905a834..fd8e0a2b1016dd8e0cf88aa4503fc5e862708c02 100644
--- a/utils/apidoc/html_diff.dart
+++ b/utils/apidoc/html_diff.dart
@@ -153,7 +153,7 @@ class HtmlDiff {
     final domNameMetadata = findMetadata(htmlType.metadata, 'DomName');
     if (domNameMetadata != null) {
       var domNames = <String>[];
-      var names = deprecatedFutureValue(domNameMetadata.getField('name'));
+      var names = domNameMetadata.getField('name');
       for (var s in names.reflectee.split(',')) {
         domNames.add(s.trim());
       }
@@ -177,7 +177,7 @@ class HtmlDiff {
     final domNameMetadata = findMetadata(htmlMember.metadata, 'DomName');
     if (domNameMetadata != null) {
       var domNames = <String>[];
-      var names = deprecatedFutureValue(domNameMetadata.getField('name'));
+      var names = domNameMetadata.getField('name');
       for (var s in names.reflectee.split(',')) {
         domNames.add(s.trim());
       }