Better remove HistoryNodes

content/renderer/history_controller.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 135 matching lines @@
           current_entry_->GetHistoryNodeForFrame(frame)) {
     existing_node->set_item(item);
     return;
   }
   RenderFrameImpl* parent =
       RenderFrameImpl::FromWebFrame(frame->GetWebFrame()->parent());
   if (!parent)
     return;
   if (HistoryEntry::HistoryNode* parent_history_node =
           current_entry_->GetHistoryNodeForFrame(parent)) {
-    parent_history_node->AddChild(item, frame->GetRoutingID());
+    parent_history_node->AddChild(item);
   }
 }
 
 void HistoryController::UpdateForCommit(RenderFrameImpl* frame,
                                         const WebHistoryItem& item,
                                         WebHistoryCommitType commit_type,
                                         bool navigation_within_page) {
   switch (commit_type) {
     case blink::WebBackForwardCommit:
       if (!provisional_entry_)
@@ skipping 45 matching lines @@
   if (HistoryEntry::HistoryNode* node =
           provisional_entry_->GetHistoryNodeForFrame(frame))
     node->RemoveChildren();
 }
 
 void HistoryController::CreateNewBackForwardItem(
     RenderFrameImpl* target_frame,
     const WebHistoryItem& new_item,
     bool clone_children_of_target) {
   if (!current_entry_) {
-    current_entry_.reset(
-        new HistoryEntry(new_item, target_frame->GetRoutingID()));
+    current_entry_.reset(new HistoryEntry(new_item));
   } else {
     current_entry_.reset(current_entry_->CloneAndReplace(
         new_item, clone_children_of_target, target_frame, render_view_));
   }
 }
 
 }  // namespace content