ChangeApiImpl: Use simplified isIgnored call

Change-Id: Ia12b5391da25e938fe1eea969b9734aa62c5f1a9
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/api/changes/ChangeApiImpl.java b/gerrit-server/src/main/java/com/google/gerrit/server/api/changes/ChangeApiImpl.java
index ed8a372..ab47f3b 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/api/changes/ChangeApiImpl.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/api/changes/ChangeApiImpl.java
@@ -677,7 +677,7 @@
   @Override
   public boolean ignored() throws RestApiException {
     try {
-      return stars.isIgnoredBy(change.getId(), change.getUser().getAccountId());
+      return stars.isIgnored(change);
     } catch (OrmException e) {
       throw asRestApiException("Cannot check if ignored", e);
     }