Make incremental marker post-process JSWeakCollection.

src/objects-visiting.h

Index: src/objects-visiting.h
diff --git a/src/objects-visiting.h b/src/objects-visiting.h
index d9ab02a20f80607d419e178ef8b12a49d25b2098..a4eb384db7de255af2ae6f93418baefb069544b9 100644
--- a/src/objects-visiting.h
+++ b/src/objects-visiting.h
@@ -73,8 +73,7 @@ class StaticVisitorBase : public AllStatic {
   V(PropertyCell)             \
   V(SharedFunctionInfo)       \
   V(JSFunction)               \
-  V(JSWeakMap)                \
-  V(JSWeakSet)                \
+  V(JSWeakCollection)         \
   V(JSArrayBuffer)            \
   V(JSTypedArray)             \
   V(JSDataView)               \
@@ -382,7 +381,6 @@ class StaticMarkingVisitor : public StaticVisitorBase {
   }
 
   INLINE(static void VisitPropertyCell(Map* map, HeapObject* object));
-  INLINE(static void VisitAllocationSite(Map* map, HeapObject* object));
   INLINE(static void VisitCodeEntry(Heap* heap, Address entry_address));
   INLINE(static void VisitEmbeddedPointer(Heap* heap, RelocInfo* rinfo));
   INLINE(static void VisitCell(Heap* heap, RelocInfo* rinfo));
@@ -404,6 +402,8 @@ class StaticMarkingVisitor : public StaticVisitorBase {
   INLINE(static void VisitCode(Map* map, HeapObject* object));
   INLINE(static void VisitSharedFunctionInfo(Map* map, HeapObject* object));
   INLINE(static void VisitConstantPoolArray(Map* map, HeapObject* object));
+  INLINE(static void VisitAllocationSite(Map* map, HeapObject* object));
+  INLINE(static void VisitWeakCollection(Map* map, HeapObject* object));
   INLINE(static void VisitJSFunction(Map* map, HeapObject* object));
   INLINE(static void VisitJSRegExp(Map* map, HeapObject* object));
   INLINE(static void VisitJSArrayBuffer(Map* map, HeapObject* object));