add type static constants suggestions

pkg/analysis_server/lib/src/services/completion/invocation_computer.dart

 // Copyright (c) 2014, 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 services.completion.computer.dart.invocation;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/suggestion_builder.dart';
@@ skipping 118 matching lines @@
  * An [Element] visitor for determining the appropriate invocation/access
  * suggestions based upon the element for which the completion is requested.
  */
 class _InvocationElementVisitor extends GeneralizingElementVisitor<Future<bool>>
     {
   final DartCompletionRequest request;
 
   _InvocationElementVisitor(this.request);
 
   @override
+  Future<bool> visitClassElement(ClassElement element) {
+    if (element != null) {
+      InterfaceType type = element.type;
+      if (type != null) {
+        ClassElementSuggestionBuilder.staticSuggestionsFor(request, type.element);
+      }
+    }
+    return new Future.value(false);
+  }
+
+  @override
   Future<bool> visitElement(Element element) {
     return new Future.value(false);
   }
 
   @override
   Future<bool> visitPrefixElement(PrefixElement element) {
     //TODO (danrubel) reimplement to use prefixElement.importedLibraries
     // once that accessor is implemented and available in Dart
     bool modified = false;
     // Find the import directive with the given prefix
@@ skipping 29 matching lines @@
 
   @override
   Future<bool> visitVariableElement(VariableElement element) {
     DartType type = element.type;
     if (type != null) {
       ClassElementSuggestionBuilder.suggestionsFor(request, type.element);
     }
     return new Future.value(true);
   }
 }