Prototype of mark-and-compact support for Harmony weak maps.

src/objects-visiting.h

Index: src/objects-visiting.h
diff --git a/src/objects-visiting.h b/src/objects-visiting.h
index cc64763b5f5ff9c85e38d9ad325c32c01f0f517e..c96a8efc738e4ea49ee92263eaa1f824cf2f5041 100644
--- a/src/objects-visiting.h
+++ b/src/objects-visiting.h
@@ -121,6 +121,7 @@ class StaticVisitorBase : public AllStatic {
     kVisitPropertyCell,
     kVisitSharedFunctionInfo,
     kVisitJSFunction,
+    kVisitJSWeakMap,
     kVisitJSRegExp,
 
     kVisitorIdCount,
@@ -317,7 +318,9 @@ class StaticNewSpaceVisitor : public StaticVisitorBase {
                                       SharedFunctionInfo::BodyDescriptor,
                                       int>::Visit);
 
-    table_.Register(kVisitJSRegExp, &VisitJSRegExp);
+    table_.Register(kVisitJSWeakMap, &VisitJSObject);
+
+    table_.Register(kVisitJSRegExp, &VisitJSObject);
 
     table_.Register(kVisitSeqAsciiString, &VisitSeqAsciiString);
 
@@ -356,15 +359,15 @@ class StaticNewSpaceVisitor : public StaticVisitorBase {
     return FixedDoubleArray::SizeFor(length);
   }
 
+  static inline int VisitJSObject(Map* map, HeapObject* object) {
+    return JSObjectVisitor::Visit(map, object);
+  }
+
   static inline int VisitSeqAsciiString(Map* map, HeapObject* object) {
     return SeqAsciiString::cast(object)->
         SeqAsciiStringSize(map->instance_type());
   }
 
-  static inline int VisitJSRegExp(Map* map, HeapObject* object) {
-    return JSObjectVisitor::Visit(map, object);
-  }
-
   static inline int VisitSeqTwoByteString(Map* map, HeapObject* object) {
     return SeqTwoByteString::cast(object)->
         SeqTwoByteStringSize(map->instance_type());