[heap] Use PageIterator in HeapObjectIterator

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 059e4038798354efb7a05c23252f0a15d69b50b7..8075d2837e3f22d3d1f17aac79d5cda85bb1d93a 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -5936,14 +5936,14 @@ HeapObject* HeapIterator::NextObject() {
   // No iterator means we are done.
   if (object_iterator_ == nullptr) return nullptr;
 
-  if (HeapObject* obj = object_iterator_->next_object()) {
+  if (HeapObject* obj = object_iterator_->Next()) {
     // If the current iterator has more objects we are fine.
     return obj;
   } else {
     // Go though the spaces looking for one that has objects.
     while (space_iterator_->has_next()) {
       object_iterator_ = space_iterator_->next();
-      if (HeapObject* obj = object_iterator_->next_object()) {
+      if (HeapObject* obj = object_iterator_->Next()) {
         return obj;
       }
     }