Revert revisions 5041 and 5042 introducing virtual scavenge...

src/objects-inl.h

Index: src/objects-inl.h
===================================================================
--- src/objects-inl.h	(revision 5045)
+++ src/objects-inl.h	(working copy)
@@ -2060,24 +2060,7 @@
   ptr[index] = value;
 }
 
-inline Scavenger Map::scavenger() {
-  Scavenger callback = reinterpret_cast<Scavenger>(
-      READ_INTPTR_FIELD(this, kIterateBodyCallbackOffset));
 
-  ASSERT(callback == Heap::GetScavenger(instance_type(),
-                                        instance_size()));
-
-  return callback;
-}
-
-inline void Map::set_scavenger(Scavenger callback) {
-  ASSERT(!reinterpret_cast<Object*>(
-      reinterpret_cast<intptr_t>(callback))->IsHeapObject());
-  WRITE_INTPTR_FIELD(this,
-                     kIterateBodyCallbackOffset,
-                     reinterpret_cast<intptr_t>(callback));
-}
-
 int Map::instance_size() {
   return READ_BYTE_FIELD(this, kInstanceSizeOffset) << kPointerSizeLog2;
 }