Resolve metadata on library tags

sdk/lib/_internal/compiler/implementation/compiler.dart

 // 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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 1042 matching lines @@
 
     log('Resolving...');
     phase = PHASE_RESOLVING;
     if (analyzeAll) {
       libraries.forEach(
           (_, lib) => fullyEnqueueLibrary(lib, enqueuer.resolution));
     }
     // Elements required by enqueueHelpers are global dependencies
     // that are not pulled in by a particular element.
     backend.enqueueHelpers(enqueuer.resolution, globalDependencies);
+    resolveLibraryMetadata();
     processQueue(enqueuer.resolution, main);
     enqueuer.resolution.logSummary(log);
 
     if (compilationFailed) return;
     if (analyzeOnly) return;
     assert(main != null);
     phase = PHASE_DONE_RESOLVING;
 
     // TODO(ahe): Remove this line. Eventually, enqueuer.resolution
     // should know this.
@@ skipping 47 matching lines @@
     if (element.isClass()) {
       ClassElement cls = element;
       cls.ensureResolved(this);
       cls.forEachLocalMember(enqueuer.resolution.addToWorkList);
       world.registerInstantiatedClass(element, globalDependencies);
     } else {
       world.addToWorkList(element);
     }
   }
 
+  // Resolves metadata on library elements.  This is necessary in order to
+  // resolve metadata classes referenced only from metadata on library tags.
+  // TODO(ahe): Figure out how to do this lazily.
+  void resolveLibraryMetadata() {
+    for (LibraryElement library in libraries.values) {
+      for (MetadataAnnotation metadata in library.metadata) {
+        metadata.ensureResolved(this);
+      }
+    }
+  }
+
   void processQueue(Enqueuer world, Element main) {
     world.nativeEnqueuer.processNativeClasses(libraries.values);
     if (main != null) {
       world.addToWorkList(main);
     }
     progress.reset();
     world.forEach((WorkItem work) {
       withCurrentElement(work.element, () => work.run(this, world));
     });
     world.queueIsClosed = true;
@@ skipping 462 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }