Issue 4048. Support for revised library/import syntax

compiler/java/com/google/dart/compiler/resolver/LibraryElementImplementation.java

Index: compiler/java/com/google/dart/compiler/resolver/LibraryElementImplementation.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/LibraryElementImplementation.java b/compiler/java/com/google/dart/compiler/resolver/LibraryElementImplementation.java
index 7c0ee180aa50ce5330b1a4c3e0fb58e6f62a5407..d3d0cf86bdd3cc5d982d2f24c951236571229ad6 100644
--- a/compiler/java/com/google/dart/compiler/resolver/LibraryElementImplementation.java
+++ b/compiler/java/com/google/dart/compiler/resolver/LibraryElementImplementation.java
@@ -4,14 +4,17 @@
 
 package com.google.dart.compiler.resolver;
 
+import com.google.common.collect.Lists;
 import com.google.dart.compiler.ast.LibraryUnit;
 
 import java.util.Collection;
+import java.util.List;
 
 class LibraryElementImplementation extends AbstractNodeElement implements LibraryElement {
 
   private final Scope importScope = new Scope("import", this);
   private final Scope scope = new Scope("library", this, importScope);
+  private final List<Element> exportedElements = Lists.newArrayList();
   private LibraryUnit libraryUnit;
   private MethodElement entryPoint;
 
@@ -36,6 +39,14 @@ class LibraryElementImplementation extends AbstractNodeElement implements Librar
     return scope;
   }
 
+  public void addExportedElements(Element element) {
+    exportedElements.add(element);
+  }
+  
+  public List<Element> getExportedElements() {
+    return exportedElements;
+  }
+
   @Override
   public ElementKind getKind() {
     return ElementKind.LIBRARY;