Fix AST-based type inference of top level function tearoffs

pkg/analyzer/lib/src/summary/link.dart

Index: pkg/analyzer/lib/src/summary/link.dart
diff --git a/pkg/analyzer/lib/src/summary/link.dart b/pkg/analyzer/lib/src/summary/link.dart
index bc2fc0def4aac9a61b6d6dc3af59ca5e3b26bb05..76569ac2636294235a595635f34a4641194dec02 100644
--- a/pkg/analyzer/lib/src/summary/link.dart
+++ b/pkg/analyzer/lib/src/summary/link.dart
@@ -1156,6 +1156,9 @@ class CompilationUnitElementInBuildUnit extends CompilationUnitElementForLink {
           numTypeParameters: element.typeParameters.length,
           containingReference:
               enclosingClass != null ? addReference(enclosingClass) : null,
+          dependency: enclosingClass != null
+              ? null
+              : library.addDependency(element.library),
           kind: kind);
     } else if (element is FunctionElementForLink_Local) {
       FunctionElementImpl parent = element.enclosingElement;
@@ -1171,6 +1174,7 @@ class CompilationUnitElementInBuildUnit extends CompilationUnitElementForLink {
           kind: ReferenceKind.function);
     } else if (element is TopLevelVariableElementForLink) {
       return addRawReference(element.name,
+          dependency: library.addDependency(element.library),
           kind: ReferenceKind.topLevelPropertyAccessor);
     } else if (element is FieldElementForLink_ClassField) {
       ClassElementForLink_Class enclosingClass = element.enclosingElement;