Expand ResolvedAst to handle synthetic constructors.

pkg/compiler/lib/src/serialization/element_serialization.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 dart2js.serialization.elements;
 
 import '../common.dart';
 import '../constants/constructors.dart';
 import '../constants/expressions.dart';
 import '../dart_types.dart';
@@ skipping 87 matching lines @@
       }
       mapEncoder.setElement(name, member);
     }
   }
 
   /// Serialize the source position of [element] into [encoder].
   static void serializePosition(Element element, ObjectEncoder encoder) {
     if (element.sourcePosition != null) {
       SourceSpan position = element.sourcePosition;
       encoder.setInt(Key.OFFSET, position.begin);
-      if (position.uri != element.compilationUnit.script.resourceUri) {
-        // TODO(johnniwinther): What is the base URI in the case?
-        encoder.setUri(Key.URI, element.library.canonicalUri, position.uri);
-      }
+      // TODO(johnniwinther): Figure out why the omitted the uri if
+      // `position.uri != element.compilationUnit.script.resourceUri` does not
+      // always work, for instance for LinkedHashMap#_literal.
+      // TODO(johnniwinther): What is the base URI in the case?
+      encoder.setUri(Key.URI, element.library.canonicalUri, position.uri);
       int length = position.end - position.begin;
       if (element.name.length != length) {
         encoder.setInt(Key.LENGTH, length);
       }
     }
   }
 
   /// Serialize the parameters of [element] into [encoder].
   static void serializeParameters(
       FunctionElement element, ObjectEncoder encoder) {
@@ skipping 560 matching lines @@
         return new LocalVariableElementZ(decoder);
       case SerializedElementKind.EXTERNAL_LIBRARY:
       case SerializedElementKind.EXTERNAL_LIBRARY_MEMBER:
       case SerializedElementKind.EXTERNAL_STATIC_MEMBER:
       case SerializedElementKind.EXTERNAL_CONSTRUCTOR:
         break;
     }
     throw new UnsupportedError("Unexpected element kind '${elementKind}.");
   }
 }