Support for new 'export' directive in resolver

compiler/java/com/google/dart/compiler/DartCompiler.java

 // Copyright (c) 2012, 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.
 
 package com.google.dart.compiler;
 
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
 import com.google.common.collect.Sets.SetView;
@@ skipping 410 matching lines @@
         if (lib == null) {
           return null;
         }
 
         libraries.put(libSrc.getUri(), lib);
 
         // Update dependencies.
         for (LibraryNode libNode : lib.getImportPaths()) {
           LibrarySource dep = getImportSource(libSrc, libNode);
           if (dep != null) {
-            lib.addImport(updateLibraries(dep), libNode);
+            LibraryUnit importedLib = updateLibraries(dep);
+            lib.addImport(importedLib, libNode);
+            if (libNode.isExported()) {
+              lib.addExport(importedLib, libNode);
+            }
+          }
+        }
+        for (LibraryNode libNode : lib.getExportPaths()) {
+          LibrarySource dep = getImportSource(libSrc, libNode);
+          if (dep != null) {
+            lib.addExport(updateLibraries(dep), libNode);
           }
         }
         return lib;
       } finally {
         Tracer.end(updateEvent);
       }
     }
 
     /**
      * @return the {@link LibrarySource} referenced in the "#import" from "libSrc". May be
@@ skipping 940 matching lines @@
           return br.readLine();
         } finally {
           br.close();
         }
       }
     } catch (Throwable e) {
     }
     return null;
   }
 }