Tweak navigation for 'part of' directives.

pkg/analysis_server/lib/src/domains/analysis/navigation_dart.dart

Index: pkg/analysis_server/lib/src/domains/analysis/navigation_dart.dart
diff --git a/pkg/analysis_server/lib/src/domains/analysis/navigation_dart.dart b/pkg/analysis_server/lib/src/domains/analysis/navigation_dart.dart
index 182f7621196c91c9b336753ba21c3ef9a05c1c1f..671e752564a5d2a66a5aa6a4f55485a4587736b5 100644
--- a/pkg/analysis_server/lib/src/domains/analysis/navigation_dart.dart
+++ b/pkg/analysis_server/lib/src/domains/analysis/navigation_dart.dart
@@ -137,8 +137,7 @@ class _DartNavigationComputerVisitor extends RecursiveAstVisitor {
 
   @override
   visitPartOfDirective(PartOfDirective node) {
-    computer._addRegion_tokenStart_nodeEnd(
-        node.keyword, node.libraryName, node.element);
+    computer._addRegionForNode(node.libraryName, node.element);
     super.visitPartOfDirective(node);
   }
 
@@ -256,12 +255,6 @@ class _DartNavigationCollector {
     _addRegion(offset, length, element);
   }
 
-  void _addRegion_tokenStart_nodeEnd(Token a, AstNode b, Element element) {
-    int offset = a.offset;
-    int length = b.end - offset;
-    _addRegion(offset, length, element);
-  }
-
   void _addRegionForNode(AstNode node, Element element) {
     int offset = node.offset;
     int length = node.length;