Serialize data for LibraryElement.getImportsFor

pkg/compiler/lib/src/elements/modelx.dart

 // Copyright (c) 2013, 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 elements.modelx;
 
 import '../common.dart';
 import '../common/names.dart' show Identifiers;
 import '../common/resolution.dart' show Resolution, ParsingContext;
 import '../compiler.dart' show Compiler;
@@ skipping 927 matching lines @@
   LibraryElement get importedLibrary => libraryDependency;
 
   @override
   accept(ElementVisitor visitor, arg) => visitor.visitImportElement(this, arg);
 
   @override
   bool get isDeferred => node.isDeferred;
 }
 
 class SyntheticImportElement extends ImportElementX {
-  SyntheticImportElement(CompilationUnitElement enclosingElement, Uri uri)
-      : super(enclosingElement, null, uri);
+  SyntheticImportElement(CompilationUnitElement enclosingElement, Uri uri,
+      LibraryElement libraryDependency)
+      : super(enclosingElement, null, uri) {
+    this.libraryDependency = libraryDependency;
+  }
 
   @override
   Token get position => library.position;
 
   @override
   bool get isSynthesized => true;
 
   @override
   bool get isDeferred => false;
 
@@ skipping 2425 matching lines @@
       body = node.asFunctionExpression().body;
     }
     return new ParsedResolvedAst(
         declaration,
         node,
         body,
         definingElement.treeElements,
         definingElement.compilationUnit.script.resourceUri);
   }
 }