Implement the new '??' operator in analyzer.

pkg/analyzer/test/generated/all_the_rest_test.dart

Index: pkg/analyzer/test/generated/all_the_rest_test.dart
diff --git a/pkg/analyzer/test/generated/all_the_rest_test.dart b/pkg/analyzer/test/generated/all_the_rest_test.dart
index 281276f1970b1084d44151fc6164bfd670ef9975..e18958753182df55b8560633d5698382e09c03d5 100644
--- a/pkg/analyzer/test/generated/all_the_rest_test.dart
+++ b/pkg/analyzer/test/generated/all_the_rest_test.dart
@@ -7450,8 +7450,9 @@ $scriptBody
     ht.Token token = scanner.tokenize();
     LineInfo lineInfo = new LineInfo(scanner.lineStarts);
     GatheringErrorListener errorListener = new GatheringErrorListener();
+    AnalysisOptionsImpl options = new AnalysisOptionsImpl();
     ht.HtmlUnit unit =
-        new ht.HtmlParser(null, errorListener).parse(token, lineInfo);
+        new ht.HtmlParser(null, errorListener, options).parse(token, lineInfo);
     errorListener.assertNoErrors();
     return unit;
   }