Fix for LibraryDirective annotations while applying resynthesized element model.

pkg/analyzer/lib/src/generated/declaration_resolver.dart

Index: pkg/analyzer/lib/src/generated/declaration_resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/declaration_resolver.dart b/pkg/analyzer/lib/src/generated/declaration_resolver.dart
index 4d24b8b615f4afa40e5f6918af793b684b7b27ca..e1b68a8101ac11ed5773539ac25343e5efaddbfa 100644
--- a/pkg/analyzer/lib/src/generated/declaration_resolver.dart
+++ b/pkg/analyzer/lib/src/generated/declaration_resolver.dart
@@ -255,8 +255,12 @@ class DeclarationResolver extends RecursiveAstVisitor<Object> {
   @override
   Object visitLibraryDirective(LibraryDirective node) {
     super.visitLibraryDirective(node);
-    _resolveAnnotations(
-        node, node.metadata, _enclosingUnit.getAnnotations(node.offset));
+    List<ElementAnnotation> annotations =
+        _enclosingUnit.getAnnotations(node.offset);
+    if (annotations.isEmpty && node.metadata.isNotEmpty) {
+      annotations = _walker.element.library.metadata;
+    }
+    _resolveAnnotations(node, node.metadata, annotations);
     return null;
   }