DRAFT CL: Add FrameNavigationEntry and track subframe session histories.

content/browser/frame_host/frame_tree_node.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/frame_tree_node.h"
 
 #include <queue>
 
 #include "base/command_line.h"
 #include "base/stl_util.h"
@@ skipping 94 matching lines @@
     // Subtle: we need to make sure the node is gone from the tree before
     // observers are notified of its deletion.
     scoped_ptr<FrameTreeNode> node_to_delete(*iter);
     children_.weak_erase(iter);
     node_to_delete->set_parent(NULL);
     node_to_delete.reset();
   }
 }
 
 void FrameTreeNode::ResetForNewProcess() {
-  current_url_ = GURL();
+  last_committed_frame_entry_ = nullptr;
 
   // The children may not have been cleared if a cross-process navigation
   // commits before the old process cleans everything up.  Make sure the child
   // nodes get deleted before swapping to a new process.
   ScopedVector<FrameTreeNode> old_children = children_.Pass();
   old_children.clear();  // May notify observers.
 }
 
 void FrameTreeNode::SetFrameName(const std::string& name) {
   replication_state_.name = name;
@@ skipping 37 matching lines @@
 }
 
 bool FrameTreeNode::CommitPendingSandboxFlags() {
   bool did_change_flags =
       effective_sandbox_flags_ != replication_state_.sandbox_flags;
   effective_sandbox_flags_ = replication_state_.sandbox_flags;
   return did_change_flags;
 }
 
 }  // namespace content