Update FrameNavigationEntry members when setting PageState.

content/browser/frame_host/frame_navigation_entry.cc

 // Copyright 2015 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 "content/browser/frame_host/frame_navigation_entry.h"
 
 #include <utility>
 
 #include "content/common/page_state_serialization.h"
 #include "content/common/site_isolation_policy.h"
@@ skipping 65 matching lines @@
   // location.replace is classified as NEW_PAGE rather than EXISTING_PAGE.
   // Same for document sequence number.  See https://crbug.com/596707.
   item_sequence_number_ = item_sequence_number;
 }
 
 void FrameNavigationEntry::set_document_sequence_number(
     int64_t document_sequence_number) {
   document_sequence_number_ = document_sequence_number;
 }
 
+void FrameNavigationEntry::SetPageState(const PageState& page_state) {
+  page_state_ = page_state;
+
+  ExplodedPageState exploded_state;
+  if (!DecodePageState(page_state_.ToEncodedData(), &exploded_state))
+    return;
+
+  item_sequence_number_ = exploded_state.top.item_sequence_number;
+  document_sequence_number_ = exploded_state.top.document_sequence_number;
+}
+
 scoped_refptr<ResourceRequestBodyImpl> FrameNavigationEntry::GetPostData()
     const {
   DCHECK(SiteIsolationPolicy::UseSubframeNavigationEntries());
   if (method_ != "POST")
     return nullptr;
 
   // Generate the body from the PageState.
   ExplodedPageState exploded_state;
   if (!DecodePageState(page_state_.ToEncodedData(), &exploded_state))
     return nullptr;
 
   return exploded_state.top.http_body.request_body;
 }
 
 }  // namespace content