Use configurations and declared variables to select import/export URIs during prelinking.

pkg/analyzer/test/src/summary/linker_test.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.
 
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:analyzer/src/summary/link.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ skipping 15 matching lines @@
   @override
   bool get allowMissingFiles => false;
 
   Matcher get isUndefined => new isInstanceOf<UndefinedElementForLink>();
 
   LibraryElementInBuildUnit get testLibrary => _testLibrary ??=
       linker.getLibrary(linkerInputs.testDartUri) as LibraryElementInBuildUnit;
 
   void createLinker(String text, {String path: '/test.dart'}) {
     linkerInputs = createLinkerInputs(text, path: path);
-    Map<String, LinkedLibraryBuilder> linkedLibraries =
-        setupForLink(linkerInputs.linkedLibraries, linkerInputs.getUnit);
+    Map<String, LinkedLibraryBuilder> linkedLibraries = setupForLink(
+        linkerInputs.linkedLibraries,
+        linkerInputs.getUnit,
+        linkerInputs.getDeclaredVariable);
     linker = new Linker(linkedLibraries, linkerInputs.getDependency,
         linkerInputs.getUnit, true);
   }
 
   LibraryElementForLink getLibrary(String uri) {
     return linker.getLibrary(Uri.parse(uri));
   }
 
   void test_apiSignature_apiChanges() {
     var bundle0 =
@@ skipping 860 matching lines @@
     PropertyAccessorElementForLink_Variable j = library.getContainedName('j');
     expect(j.variable.initializer, isNull);
     PropertyAccessorElementForLink_Variable v = library.getContainedName('v');
     expect(v.variable.initializer, isNotNull);
   }
 
   VariableElementForLink _getVariable(ReferenceableElementForLink element) {
     return (element as PropertyAccessorElementForLink_Variable).variable;
   }
 }