Fix for LibraryDirective annotations while applying resynthesized element model.

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

 // Copyright (c) 2016, 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 analyzer.src.generated.declaration_resolver;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 237 matching lines @@
   Object visitLabeledStatement(LabeledStatement node) {
     bool onSwitchStatement = node.statement is SwitchStatement;
     _walker.elementBuilder
         .buildLabelElements(node.labels, onSwitchStatement, false);
     return super.visitLabeledStatement(node);
   }
 
   @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;
   }
 
   @override
   Object visitMethodDeclaration(MethodDeclaration node) {
     Token property = node.propertyKeyword;
     SimpleIdentifier methodName = node.name;
     String nameOfMethod = methodName.name;
     ExecutableElement element;
     if (property == null) {
@@ skipping 386 matching lines @@
 class _ElementMismatchException extends AnalysisException {
   /**
    * Creates an exception to refer to the given [compilationUnit], [element],
    * and [cause].
    */
   _ElementMismatchException(
       CompilationUnitElement compilationUnit, Element element,
       [CaughtException cause = null])
       : super('Element mismatch in $compilationUnit at $element', cause);
 }