Make more use of generated code in analysis server.

pkg/analysis_server/lib/src/computer/computer_navigation.dart

Index: pkg/analysis_server/lib/src/computer/computer_navigation.dart
diff --git a/pkg/analysis_server/lib/src/computer/computer_navigation.dart b/pkg/analysis_server/lib/src/computer/computer_navigation.dart
index e5a4d7d8dc055629940dd2948becb508da40a89e..ca8b97de8b3d186e94d82c4b12db9a31c2d3a3e3 100644
--- a/pkg/analysis_server/lib/src/computer/computer_navigation.dart
+++ b/pkg/analysis_server/lib/src/computer/computer_navigation.dart
@@ -4,13 +4,12 @@
 
 library computer.navigation;
 
+import 'package:analysis_server/src/protocol2.dart' as protocol;
 import 'package:analysis_server/src/constants.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 
-import 'element.dart' as computer;
-
 
 /**
  * A computer for navigation regions in a Dart [CompilationUnit].
@@ -37,7 +36,7 @@ class DartUnitNavigationComputer {
     if (element is FieldFormalParameterElement) {
       element = (element as FieldFormalParameterElement).field;
     }
-    var elementJson = new computer.Element.fromEngine(element).toJson();
+    var elementJson = new protocol.Element.fromEngine(element).toJson();
     _regions.add({
       OFFSET: offset,
       LENGTH: length,