Ntp: restore scroll position.

content/browser/frame_host/navigation_entry_impl.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 "content/browser/frame_host/navigation_entry_impl.h"
 
 #include <stddef.h>
 
 #include <queue>
 #include <utility>
@@ skipping 564 matching lines @@
 bool NavigationEntryImpl::GetExtraData(const std::string& key,
                                        base::string16* data) const {
   std::map<std::string, base::string16>::const_iterator iter =
       extra_data_.find(key);
   if (iter == extra_data_.end())
     return false;
   *data = iter->second;
   return true;
 }
 
+const std::map<std::string, base::string16>& NavigationEntryImpl::GetExtraData()
+    const {
+  return extra_data_;
+}
+
 void NavigationEntryImpl::ClearExtraData(const std::string& key) {
   extra_data_.erase(key);
 }
 
 std::unique_ptr<NavigationEntryImpl> NavigationEntryImpl::Clone() const {
   return NavigationEntryImpl::CloneAndReplace(nullptr, false, nullptr, nullptr);
 }
 
 std::unique_ptr<NavigationEntryImpl> NavigationEntryImpl::CloneAndReplace(
     FrameNavigationEntry* frame_navigation_entry,
@@ skipping 311 matching lines @@
       return node;
 
     // Enqueue any children and keep looking.
     for (auto* child : node->children)
       work_queue.push(child);
   }
   return nullptr;
 }
 
 }  // namespace content