Sort the containing method first in completions following super

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

Index: pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart b/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
index 0e15afd9f9831b4bdd94f72596b86a2e35a49368..5abb208511d07e5d3d1a32f20af5d097326b6cfd 100644
--- a/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
+++ b/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
@@ -73,8 +73,20 @@ class _ExpressionSuggestionBuilder implements SuggestionBuilder {
       }
     }
     if (node is Expression) {
+      String containingMethodName;
+      bool isSuper = node is SuperExpression;
+      if (isSuper) {
+        MethodDeclaration containingMethod =
+            node.getAncestor((p) => p is MethodDeclaration);
+        if (containingMethod != null) {
+          SimpleIdentifier id = containingMethod.name;
+          if (id != null) {
+            containingMethodName = id.name;
+          }
+        }
+      }
       InterfaceTypeSuggestionBuilder.suggestionsFor(request, node.bestType,
-          isSuper: node is SuperExpression);
+          isSuper: isSuper, containingMethodName: containingMethodName);
       return new Future.value(true);
     }
     return new Future.value(false);