[heap] Unregister shrinked large object memory from chunk map.

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index a85dce5985021bb1145334789d4f900586442252..66bb87d99b70ab4c5e510703bc10c47e24dd81c4 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -3051,6 +3051,10 @@ class LargeObjectSpace : public Space {
   // Frees unmarked objects.
   void FreeUnmarkedObjects();
 
+  void InsertChunkMapEntries(LargePage* page);
+  void RemoveChunkMapEntries(LargePage* page);
+  void RemoveChunkMapEntries(LargePage* page, Address free_start);
+
   // Checks whether a heap object is in this space; O(1).
   bool Contains(HeapObject* obj);
   // Checks whether an address is in the object area in this space. Iterates