DRAFT CL: Add FrameNavigationEntry and track subframe session histories.

content/renderer/history_entry.h

 // Copyright 2014 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.
 
 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  *     (http://www.torchmobile.com/)
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 61 matching lines @@
     void set_item(const blink::WebHistoryItem& item);
     std::vector<HistoryNode*>& children() const { return children_->get(); }
     void RemoveChildren();
 
    private:
     HistoryEntry* entry_;
     scoped_ptr<ScopedVector<HistoryNode> > children_;
     blink::WebHistoryItem item_;
   };
 
+  // TODO(creis): Temporary hack to update RenderFrame routing ID -> FSN map
+  // when RenderFrames swap to RenderFrameProxies and back.  Remove when we
+  // don't need HistoryEntry anymore.
+  static void UpdateFrameMap(uint64_t old_routing_id, uint64_t new_routing_id);
+
   HistoryEntry(const blink::WebHistoryItem& root, int64_t frame_id);
   HistoryEntry();
   ~HistoryEntry();
 
   HistoryEntry* CloneAndReplace(const blink::WebHistoryItem& newItem,
                                 bool clone_children_of_target,
                                 RenderFrameImpl* target_frame,
                                 RenderViewImpl* render_view);
 
   HistoryNode* GetHistoryNodeForFrame(RenderFrameImpl* frame);
   blink::WebHistoryItem GetItemForFrame(RenderFrameImpl* frame);
   const blink::WebHistoryItem& root() const { return root_->item(); }
   HistoryNode* root_history_node() const { return root_.get(); }
 
  private:
 
   scoped_ptr<HistoryNode> root_;
 
   typedef base::hash_map<uint64_t, HistoryNode*> FramesToItems;
   FramesToItems frames_to_items_;
 
   typedef base::hash_map<std::string, HistoryNode*> UniqueNamesToItems;
   UniqueNamesToItems unique_names_to_items_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_HISTORY_ENTRY_H_