Address CR feedback.

Author: jtibshirani

server/src/main/java/org/elasticsearch/index/query/ExistsQueryBuilder.java

@@ -168,19 +168,19 @@ private static Query newLegacyExistsQuery(QueryShardContext context, Collection<
         // We create TermsQuery directly here rather than using FieldNamesFieldType.termsQuery()
         // so we don't end up with deprecation warnings
         if (fields.size() == 1) {
-            Query filter = newLegacyTermQuery(context, fields.iterator().next());
+            Query filter = newLegacyExistsQuery(context, fields.iterator().next());
             return new ConstantScoreQuery(filter);
         }
 
         BooleanQuery.Builder boolFilterBuilder = new BooleanQuery.Builder();
         for (String field : fields) {
-            Query filter = newLegacyTermQuery(context, field);
+            Query filter = newLegacyExistsQuery(context, field);
             boolFilterBuilder.add(filter, BooleanClause.Occur.SHOULD);
         }
         return new ConstantScoreQuery(boolFilterBuilder.build());
     }
 
-    private static Query newLegacyTermQuery(QueryShardContext context, String field) {
+    private static Query newLegacyExistsQuery(QueryShardContext context, String field) {
         MappedFieldType fieldType = context.fieldMapper(field);
         String fieldName = fieldType != null ? fieldType.name() : field;
         return new TermQuery(new Term(FieldNamesFieldMapper.NAME, fieldName));