Revert "Precisely sweeping of scan-on-scavenge pages."

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 25a3b85caba31f7f514bca2c29329017623a3e7b..7fa2a0e0cfd45c007182aa181523905b87b8af62 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -1480,22 +1480,6 @@ int HeapObject::Size() {
 }
 
 
-bool HeapObject::ContainsPointers() {
-  InstanceType type = map()->instance_type();
-  if (type <= LAST_NAME_TYPE) {
-    if (type == SYMBOL_TYPE) {
-      return true;
-    }
-    ASSERT(type < FIRST_NONSTRING_TYPE);
-    // There are four string representations: sequential strings, external
-    // strings, cons strings, and sliced strings.
-    // Only the latter two contain non-map-word pointers to heap objects.
-    return ((type & kIsIndirectStringMask) == kIsIndirectStringTag);
-  }
-  return (type > LAST_DATA_TYPE);
-}
-
-
 void HeapObject::IteratePointers(ObjectVisitor* v, int start, int end) {
   v->VisitPointers(reinterpret_cast<Object**>(FIELD_ADDR(this, start)),
                    reinterpret_cast<Object**>(FIELD_ADDR(this, end)));