Rollback r41807.

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

Index: pkg/analysis_server/lib/src/services/index/index.dart
diff --git a/pkg/analysis_server/lib/src/services/index/index.dart b/pkg/analysis_server/lib/src/services/index/index.dart
index 7c3effbaf7d1197dc85fa5e1d578dd8fc077dc35..acfc8351e439cea12722351873c8c6dced98a428 100644
--- a/pkg/analysis_server/lib/src/services/index/index.dart
+++ b/pkg/analysis_server/lib/src/services/index/index.dart
@@ -315,17 +315,12 @@ class LocationWithData<D> extends Location {
  * a concrete kind of this name - field, method or something else.
  */
 class NameElement extends ElementImpl {
-  NameElement(String name) : super('name:$name', -1);
+  NameElement(String name) : super("name:${name}", -1);
 
   @override
   ElementKind get kind => ElementKind.NAME;
 
   @override
-  bool operator ==(Object other) {
-    return other is NameElement && other.name == name;
-  }
-
-  @override
   accept(ElementVisitor visitor) => null;
 }