Add item and document sequence numbers to FrameNavigationEntry.

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"
 
 namespace content {
 
 FrameNavigationEntry::FrameNavigationEntry(int64 frame_tree_node_id)
-    : frame_tree_node_id_(frame_tree_node_id) {
+    : frame_tree_node_id_(frame_tree_node_id),
+      item_sequence_number_(-1),
+      document_sequence_number_(-1) {
 }
 
 FrameNavigationEntry::FrameNavigationEntry(int64 frame_tree_node_id,
+                                           int64 item_sequence_number,
+                                           int64 document_sequence_number,
                                            SiteInstanceImpl* site_instance,
                                            const GURL& url,
                                            const Referrer& referrer)
     : frame_tree_node_id_(frame_tree_node_id),
+      item_sequence_number_(item_sequence_number),
+      document_sequence_number_(document_sequence_number),
       site_instance_(site_instance),
       url_(url),
       referrer_(referrer) {
 }
 
 FrameNavigationEntry::~FrameNavigationEntry() {
 }
 
 FrameNavigationEntry* FrameNavigationEntry::Clone() const {
   FrameNavigationEntry* copy = new FrameNavigationEntry(frame_tree_node_id_);
-  copy->UpdateEntry(site_instance_.get(), url_, referrer_, page_state_);
+  copy->UpdateEntry(item_sequence_number_, document_sequence_number_,
+                    site_instance_.get(), url_, referrer_, page_state_);
   return copy;
 }
 
-void FrameNavigationEntry::UpdateEntry(SiteInstanceImpl* site_instance,
+void FrameNavigationEntry::UpdateEntry(int64 item_sequence_number,
+                                       int64 document_sequence_number,
+                                       SiteInstanceImpl* site_instance,
                                        const GURL& url,
                                        const Referrer& referrer,
                                        const PageState& page_state) {
+  item_sequence_number_ = item_sequence_number;
+  document_sequence_number_ = document_sequence_number;
   site_instance_ = site_instance;
   url_ = url;
   referrer_ = referrer;
   page_state_ = page_state;
 }
 
 }  // namespace content