Fix for searching constructor references.

pkg/analysis_server/lib/src/services/index/index_contributor.dart

Index: pkg/analysis_server/lib/src/services/index/index_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/index/index_contributor.dart b/pkg/analysis_server/lib/src/services/index/index_contributor.dart
index 3159baf8b56344ad2623cd676a97d17d13830471..c8748faed4f9ee325fadd667700b1485c95d3c1b 100644
--- a/pkg/analysis_server/lib/src/services/index/index_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/index/index_contributor.dart
@@ -220,20 +220,6 @@ class _IndexContributor extends GeneralizingAstVisitor<Object> {
   @override
   Object visitConstructorDeclaration(ConstructorDeclaration node) {
     ConstructorElement element = node.element;
-    // define
-    {
-      Location location;
-      if (node.name != null) {
-        int start = node.period.offset;
-        int end = node.name.end;
-        location = _createLocationForOffset(start, end - start);
-      } else {
-        int start = node.returnType.end;
-        location = _createLocationForOffset(start, 0);
-      }
-      recordRelationship(element, IndexConstants.NAME_IS_DEFINED_BY, location);
-    }
-    // visit children
     enterScope(element);
     try {
       return super.visitConstructorDeclaration(node);