Search only for potential name references to Class members.

pkg/analysis_server/lib/src/search/element_references.dart

Index: pkg/analysis_server/lib/src/search/element_references.dart
diff --git a/pkg/analysis_server/lib/src/search/element_references.dart b/pkg/analysis_server/lib/src/search/element_references.dart
index a03666137d1ca80ddd7c9d0df8cb8ed53ef8b3aa..436d05262d4f6862ec3c91d1c017e7f6f735c110 100644
--- a/pkg/analysis_server/lib/src/search/element_references.dart
+++ b/pkg/analysis_server/lib/src/search/element_references.dart
@@ -30,7 +30,7 @@ class ElementReferencesComputer {
     // find element references
     futureGroup.add(_findElementsReferences(element));
     // add potential references
-    if (withPotential) {
+    if (withPotential && _isMemberElement(element)) {
       String name = element.displayName;
       var matchesFuture = searchEngine.searchMemberReferences(name);
       var resultsFuture = matchesFuture.then((List<SearchMatch> matches) {
@@ -105,6 +105,10 @@ class ElementReferencesComputer {
     return new SearchResult.fromMatch(match);
   }
 
+  static bool _isMemberElement(Element element) {
+    return element.enclosingElement is ClassElement;
+  }
+
   static bool _isVariableLikeElement(Element element) {
     if (element is LocalVariableElement) {
       return true;