Support metadata on patches.

pkg/compiler/lib/src/deferred_load.dart

 // Copyright (c) 2014, 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 deferred_load;
 
 import 'common/backend_api.dart' show
     Backend;
 import 'common/tasks.dart' show
     CompilerTask;
@@ skipping 514 matching lines @@
     Set<String> usedImportNames = new Set<String>();
 
     // Finds the first argument to the [DeferredLibrary] annotation
     void computeImportDeferName(Import import) {
       String result;
       if (import == _fakeMainImport) {
         result = "main";
       } else if (import.isDeferred) {
         result = import.prefix.toString();
       } else {
-        Link<MetadataAnnotation> metadatas = import.metadata;
+        List<MetadataAnnotation> metadatas = import.metadata;
         assert(metadatas != null);
         for (MetadataAnnotation metadata in metadatas) {
           metadata.ensureResolved(compiler);
           ConstantValue value =
               compiler.constants.getConstantValue(metadata.constant);
           Element element = value.getType(compiler.coreTypes).element;
           if (element == deferredLibraryClass) {
             ConstructedConstantValue constant = value;
             StringConstantValue s = constant.fields.values.single;
             result = s.primitiveValue.slowToString();
@@ skipping 170 matching lines @@
       compiler.withCurrentElement(library, () {
         prefixDeferredImport.clear();
         usedPrefixes.clear();
         // TODO(sigurdm): Make helper getLibraryImportTags when tags is a List
         // instead of a Link.
         for (LibraryTag tag in library.tags) {
           if (tag is! Import) continue;
           Import import = tag;
 
           /// Give an error if the old annotation-based syntax has been used.
-          Link<MetadataAnnotation> metadataList = import.metadata;
+          List<MetadataAnnotation> metadataList = import.metadata;
           if (metadataList != null) {
             for (MetadataAnnotation metadata in metadataList) {
               metadata.ensureResolved(compiler);
               ConstantValue value =
                   compiler.constants.getConstantValue(metadata.constant);
               Element element = value.getType(compiler.coreTypes).element;
               if (element == deferredLibraryClass) {
                  compiler.reportError(
                      import, MessageKind.DEFERRED_OLD_SYNTAX);
               }
@@ skipping 147 matching lines @@
         _importingLibrary = importingLibrary;
 
   String get importingLibraryName {
     String libraryName = _importingLibrary.getLibraryName();
     return libraryName == ""
       ? "<unnamed>"
       : libraryName;
   }
 
 }