DRAFT CL: Add FrameNavigationEntry and track subframe session histories.

content/renderer/history_entry.cc

 // 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 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  *     (http://www.torchmobile.com/)
  *
@@ skipping 36 matching lines @@
 // Frame routing ids are not safe to serialize, so instead create a mapping
 // from routing ids to frame sequence numbers. The sequence numbers can be
 // benignly serialized with limited risk of collision in a different process.
 // FrameMap is a singleton per-process.
 typedef base::hash_map<uint64_t, uint64_t> FrameMap;
 static FrameMap& GetFrameMap() {
   CR_DEFINE_STATIC_LOCAL(FrameMap, routing_ids_to_internal_frame_ids, ());
   return routing_ids_to_internal_frame_ids;
 }
 
+// static
+void HistoryEntry::UpdateFrameMap(uint64_t old_routing_id,
+                                  uint64_t new_routing_id) {
+  if (GetFrameMap()[old_routing_id]) {
+    GetFrameMap()[new_routing_id] = GetFrameMap()[old_routing_id];
+    GetFrameMap().erase(old_routing_id);
+  }
+}
+
 HistoryEntry::HistoryNode* HistoryEntry::HistoryNode::AddChild(
     const WebHistoryItem& item,
     int64_t frame_id) {
   children_->push_back(new HistoryNode(entry_, item, frame_id));
   return children_->back();
 }
 
 HistoryEntry::HistoryNode* HistoryEntry::HistoryNode::AddChild() {
   return AddChild(WebHistoryItem(), kInvalidFrameRoutingID);
 }
@@ skipping 139 matching lines @@
   return unique_names_to_items_[frame->GetWebFrame()->uniqueName().utf8()];
 }
 
 WebHistoryItem HistoryEntry::GetItemForFrame(RenderFrameImpl* frame) {
   if (HistoryNode* history_node = GetHistoryNodeForFrame(frame))
     return history_node->item();
   return WebHistoryItem();
 }
 
 }  // namespace content