Allow S->T <: dynamic->T

lib/src/testing.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dev_compiler.src.testing;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart' show TimestampedData;
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 131 matching lines @@
   Uri _current;
 
   void enterLibrary(Uri uri) {
     super.enterLibrary(uri);
     infoMap[uri] = {};
     _current = uri;
   }
 
   void log(Message info) {
     super.log(info);
-    if (info is! StaticInfo) return;
-    infoMap[_current].putIfAbsent(info.node, () => []).add(info);
+    if (info is StaticInfo) {
+      infoMap[_current].putIfAbsent(info.node, () => []).add(info);
+    }
   }
 }
 
 /// Create an error explanation for errors that were not expected, but that the
 /// checker produced.
 String _unexpectedErrors(AstNode node, List errors) {
   final span = _spanFor(node);
   return errors.map((e) {
     var level = e.level.name.toLowerCase();
     return '$level: ${span.message(e.message, color: colorOf(level))}';
@@ skipping 171 matching lines @@
 
   SourceSpan spanFor(AstNode node) {
     final begin = node is AnnotatedNode
         ? node.firstTokenAfterCommentAndMetadata.offset
         : node.offset;
     return _file.span(begin, node.end);
   }
 
   String toString() => '[$runtimeType: $uri]';
 }