[heap] Minor MC: Implement page moving

src/heap/spaces.cc

Index: src/heap/spaces.cc
diff --git a/src/heap/spaces.cc b/src/heap/spaces.cc
index afbb452f54527878fe55a8b4034344f51b535627..db8fb4b7d066bb67c6454827b3570cad811e77d7 100644
--- a/src/heap/spaces.cc
+++ b/src/heap/spaces.cc
@@ -56,10 +56,14 @@ bool HeapObjectIterator::AdvanceToNextPage() {
   DCHECK_EQ(cur_addr_, cur_end_);
   if (current_page_ == page_range_.end()) return false;
   Page* cur_page = *(current_page_++);
-  space_->heap()
-      ->mark_compact_collector()
-      ->sweeper()
-      .SweepOrWaitUntilSweepingCompleted(cur_page);
+  Heap* heap = space_->heap();
+
+  heap->mark_compact_collector()->sweeper().SweepOrWaitUntilSweepingCompleted(
+      cur_page);
+  if (cur_page->IsFlagSet(Page::SWEEP_TO_ITERATE))
+    heap->minor_mark_compact_collector()->MakeIterable(
+        cur_page, MarkingTreatmentMode::CLEAR,
+        FreeSpaceTreatmentMode::IGNORE_FREE_SPACE);
   cur_addr_ = cur_page->area_start();
   cur_end_ = cur_page->area_end();
   DCHECK(cur_page->SweepingDone());