Fix presubmit issues introduced by r6230.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index b04aa310b894c2526ba636201b091d646f9700c7..4a29c21df74c4c60ed4afaef491f45d42bd6bb17 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -1202,7 +1202,8 @@ void MarkCompactCollector::MarkObjectGroups() {
     bool group_marked = false;
     for (int j = 0; j < objects.length(); j++) {
       Object* object = *objects[j];
-      if (object->IsHeapObject() && Marking::IsMarked(HeapObject::cast(object))) {
+      if (object->IsHeapObject()
+          && Marking::IsMarked(HeapObject::cast(object))) {
         group_marked = true;
         break;
       }