Fix AST-based type inference of top level function tearoffs

pkg/analyzer/lib/src/summary/link.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.
 
 /**
  * This library is capable of producing linked summaries from unlinked
  * ones (or prelinked ones).  It functions by building a miniature
  * element model to represent the contents of the summaries, and then
  * scanning the element model to gather linked information and adding
  * it to the summary data structures.
@@ skipping 1138 matching lines @@
           kind = ReferenceKind.propertyAccessor;
           break;
         default:
           // TODO(paulberry): implement other cases as necessary
           throw new UnimplementedError('${element._unlinkedExecutable.kind}');
       }
       return addRawReference(element.name,
           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;
       int localIndex = parent.functions.indexOf(element);
       assert(localIndex != -1);
       return addRawReference(element.name,
           containingReference: addReference(parent),
           kind: ReferenceKind.function,
           localIndex: localIndex);
     } else if (element is FunctionElementForLink_Initializer) {
       return addRawReference('',
           containingReference: addReference(element.enclosingElement),
           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;
       // TODO(paulberry): do we need to set numTypeParameters to nonzero if the
       // class has type parameters?
       return addRawReference(element.name,
           containingReference: addReference(enclosingClass),
           kind: ReferenceKind.propertyAccessor);
     }
     // TODO(paulberry): implement other cases
@@ skipping 3641 matching lines @@
    * there are no type parameters in scope.
    */
   TypeParameterizedElementForLink get _typeParameterContext;
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 
   @override
   String toString() => '$enclosingElement.$name';
 }