Remove SendPortSync and ReceivePortSync.

tools/dom/templates/html/dartium/html_dartium.darttemplate

Index: tools/dom/templates/html/dartium/html_dartium.darttemplate
diff --git a/tools/dom/templates/html/dartium/html_dartium.darttemplate b/tools/dom/templates/html/dartium/html_dartium.darttemplate
index 0ee99a3c1ec4b3ecf075f0239d426fa5f0b766a7..8d4316a61fd341453975375a6c80332e2bbbaaa8 100644
--- a/tools/dom/templates/html/dartium/html_dartium.darttemplate
+++ b/tools/dom/templates/html/dartium/html_dartium.darttemplate
@@ -66,7 +66,6 @@ part '$AUXILIARY_DIR/EventListener.dart';
 part '$AUXILIARY_DIR/EventStreamProvider.dart';
 part '$AUXILIARY_DIR/Html5NodeValidator.dart';
 part '$AUXILIARY_DIR/ImmutableListMixin.dart';
-part '$AUXILIARY_DIR/Isolates.dart';
 part '$AUXILIARY_DIR/KeyCode.dart';
 part '$AUXILIARY_DIR/KeyLocation.dart';
 part '$AUXILIARY_DIR/KeyName.dart';
@@ -119,22 +118,3 @@ HtmlDocument get document {
   _document = window.document;
   return _document;
 }
-
-int _getNewIsolateId() => _Utils._getNewIsolateId();
-
-bool _callPortInitialized = false;
-var _callPortLastResult = null;
-
-_callPortSync(num id, var message) {
-  if (!_callPortInitialized) {
-    window.on['js-result'].listen((event) {
-      _callPortLastResult = JSON.decode(_getPortSyncEventData(event));
-    });
-    _callPortInitialized = true;
-  }
-  assert(_callPortLastResult == null);
-  _dispatchEvent('js-sync-message', {'id': id, 'message': message});
-  var result = _callPortLastResult;
-  _callPortLastResult = null;
-  return result;
-}