Set empty namespaces for public/exportNamespace of synthetic libraries.

pkg/analyzer/test/src/summary/resynthesize_common.dart

 // Copyright (c) 2015, 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 test.src.serialization.elements_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 4659 matching lines @@
     checkLibrary('@foo() class C {}', allowErrors: true);
   }
 
   test_unresolved_export() {
     allowMissingFiles = true;
     checkLibrary("export 'foo.dart';", allowErrors: true);
   }
 
   test_unresolved_import() {
     allowMissingFiles = true;
-    checkLibrary("import 'foo.dart';", allowErrors: true);
-  }
-
-  test_unresolved_import_deferred() {

[Paul Berry, 2016/12/08 12:58:22]

Why are we getting rid of this test?

[scheglov, 2016/12/08 15:53:09]

I realized that this test does not add anything new.
I should have updated the previous test with the "loadLibraryFunction" test,
which presence does not depend on whether the library is deferred or not.
So, I fixed the glitch.

-    allowMissingFiles = true;
     LibraryElementImpl library =
-        checkLibrary("import 'missing.dart' deferred as p;");
-    expect(library.imports[0].importedLibrary.loadLibraryFunction, isNotNull);
+        checkLibrary("import 'foo.dart';", allowErrors: true);
+    LibraryElement importedLibrary = library.imports[0].importedLibrary;
+    expect(importedLibrary.loadLibraryFunction, isNotNull);
+    expect(importedLibrary.publicNamespace, isNotNull);
+    expect(importedLibrary.exportNamespace, isNotNull);
   }
 
   test_unresolved_part() {
     allowMissingFiles = true;
     checkLibrary("part 'foo.dart';", allowErrors: true);
   }
 
   test_unused_type_parameter() {
     checkLibrary('''
 class C<T> {
@@ skipping 143 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }