Add DidSaveScrollOrScaleState flag to prevent restoreScrollPositionAndViewState restore from default

third_party/WebKit/Source/web/WebHistoryItem.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 180 matching lines @@
   const Vector<String>& referencedFilePaths =
       m_private->getReferencedFilePaths();
   for (size_t i = 0; i < referencedFilePaths.size(); ++i)
     filePaths.insert(referencedFilePaths[i]);
 
   Vector<String> results;
   copyToVector(filePaths, results);
   return results;
 }
 
+bool WebHistoryItem::didSaveScrollOrScaleState() const {
+  return m_private->didSaveScrollOrScaleState();
+}
+
+void WebHistoryItem::setDidSaveScrollOrScaleState(
+    bool hasSaveScrollOrScaleState) {
+  m_private->setDidSaveScrollOrScaleState(hasSaveScrollOrScaleState);
+}
+
 WebHistoryItem::WebHistoryItem(HistoryItem* item) : m_private(item) {}
 
 WebHistoryItem& WebHistoryItem::operator=(HistoryItem* item) {
   m_private = item;
   return *this;
 }
 
 WebHistoryItem::operator HistoryItem*() const {
   return m_private.get();
 }
 
 }  // namespace blink