Add DidSaveScrollOrScaleState flag to prevent restoreScrollPositionAndViewState restore from default

content/common/page_state_serialization_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include <cmath>
 
 #include "base/base64.h"
 #include "base/files/file_util.h"
@@ skipping 421 matching lines @@
 }
 
 TEST_F(PageStateSerializationTest, BackwardsCompat_v21) {
   TestBackwardsCompat(21);
 }
 
 TEST_F(PageStateSerializationTest, BackwardsCompat_v22) {
   TestBackwardsCompat(22);
 }
 
+TEST_F(PageStateSerializationTest, BackwardsCompat_v23) {
+  TestBackwardsCompat(23);
+}
+
 }  // namespace
 }  // namespace content