Update the plugin API

pkg/analyzer_plugin/test/utilities/navigation_test.dart

Index: pkg/analyzer_plugin/test/utilities/navigation_test.dart
diff --git a/pkg/analyzer_plugin/test/utilities/navigation_test.dart b/pkg/analyzer_plugin/test/utilities/navigation_test.dart
index 0d032d9a7e338817f8365ff24a1c65ba639b6e3c..dc4a9cc20452be99bc07cc12edb01f6e0174a56c 100644
--- a/pkg/analyzer_plugin/test/utilities/navigation_test.dart
+++ b/pkg/analyzer_plugin/test/utilities/navigation_test.dart
@@ -25,7 +25,7 @@ class NavigationGeneratorTest {
   test_none() {
     NavigationGenerator generator = new NavigationGenerator([]);
     NavigationRequest request =
-        new NavigationRequestImpl(provider, 0, 100, resolveResult);
+        new DartNavigationRequestImpl(provider, 0, 100, resolveResult);
     GeneratorResult result = generator.generateNavigationNotification(request);
     expect(result.notifications, hasLength(1));
   }
@@ -34,7 +34,7 @@ class NavigationGeneratorTest {
     TestContributor contributor = new TestContributor();
     NavigationGenerator generator = new NavigationGenerator([contributor]);
     NavigationRequest request =
-        new NavigationRequestImpl(provider, 0, 100, resolveResult);
+        new DartNavigationRequestImpl(provider, 0, 100, resolveResult);
     GeneratorResult result = generator.generateNavigationNotification(request);
     expect(result.notifications, hasLength(1));
     expect(contributor.count, 1);
@@ -53,7 +53,7 @@ class NavigationGeneratorTest {
     NavigationGenerator generator = new NavigationGenerator(
         [contributor1, contributor2, contributor3, contributor4]);
     NavigationRequest request =
-        new NavigationRequestImpl(provider, 0, 100, resolveResult);
+        new DartNavigationRequestImpl(provider, 0, 100, resolveResult);
     GeneratorResult result = generator.generateNavigationNotification(request);
     expect(result.notifications, hasLength(3));
     expect(