Clone the subframe FrameNavigationEntries for in-page navigations.

content/browser/frame_host/navigation_entry_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 28 matching lines @@
 
     // Recursively makes a deep copy of TreeNode with copies of each of the
     // FrameNavigationEntries in the subtree.  Replaces the TreeNode
     // corresponding to |frame_tree_node| (and all of its children) with a new
     // TreeNode for |frame_navigation_entry|.  Pass nullptr for both parameters
     // to make a complete clone.
     // TODO(creis): For --site-per-process, share FrameNavigationEntries between
     // NavigationEntries of the same tab.
     scoped_ptr<TreeNode> CloneAndReplace(
         FrameTreeNode* frame_tree_node,
-        FrameNavigationEntry* frame_navigation_entry) const;
+        FrameNavigationEntry* frame_navigation_entry,
+        bool clone_children_of_target) const;
 
     // Ref counted pointer that keeps the FrameNavigationEntry alive as long as
     // it is needed by this node's NavigationEntry.
     scoped_refptr<FrameNavigationEntry> frame_entry;
 
     // List of child TreeNodes, which will be deleted when this node is.
     ScopedVector<TreeNode> children;
   };
 
   static NavigationEntryImpl* FromNavigationEntry(NavigationEntry* entry);
@@ skipping 72 matching lines @@
   // cleared in ResetForCommit.
   scoped_ptr<NavigationEntryImpl> Clone() const;
 
   // Like |Clone|, but replaces the FrameNavigationEntry corresponding to
   // |frame_tree_node| (and all its children) with |frame_entry|.
   // TODO(creis): Once we start sharing FrameNavigationEntries between
   // NavigationEntryImpls, we will need to support two versions of Clone: one
   // that shares the existing FrameNavigationEntries (for use within the same
   // tab) and one that draws them from a different pool (for use in a new tab).
   scoped_ptr<NavigationEntryImpl> CloneAndReplace(
-      FrameTreeNode* frame_tree_node, FrameNavigationEntry* frame_entry) const;
+      FrameTreeNode* frame_tree_node,
+      FrameNavigationEntry* frame_entry,
+      bool clone_children_of_target) const;
 
   // Helper functions to construct NavigationParameters for a navigation to this
   // NavigationEntry.
   CommonNavigationParams ConstructCommonNavigationParams(
       const GURL& dest_url,
       const Referrer& dest_referrer,
       const FrameNavigationEntry& frame_entry,
       FrameMsg_Navigate_Type::Value navigation_type) const;
   StartNavigationParams ConstructStartNavigationParams() const;
   RequestNavigationParams ConstructRequestNavigationParams(
@@ skipping 11 matching lines @@
   void ResetForCommit();
 
   // Exposes the tree of FrameNavigationEntries that make up this joint session
   // history item.
   // In default Chrome, this tree only has a root node with an unshared
   // FrameNavigationEntry.  Subframes are only added to the tree if the
   // --site-per-process flag is passed.
   TreeNode* root_node() const {
     return frame_tree_.get();
   }
+  // TODO(creis): Avoid exposing this.
+  void set_root_node(scoped_ptr<TreeNode> root_node) {
+    frame_tree_ = root_node.Pass();
+  }
 
   // Finds the TreeNode associated with |frame_tree_node_id| to add or update
   // its FrameNavigationEntry.  A new FrameNavigationEntry is added if none
   // exists, or else the existing one (which might be shared with other
   // NavigationEntries) is updated with the given parameters.
   // Does nothing if there is no entry already and |url| is about:blank, since
   // that does not count as a real commit.
   void AddOrUpdateFrameEntry(FrameTreeNode* frame_tree_node,
                              int64 item_sequence_number,
                              int64 document_sequence_number,
@@ skipping 293 matching lines @@
   // persisted, unless specific data is taken out/put back in at save/restore
   // time (see TabNavigation for an example of this).
   std::map<std::string, base::string16> extra_data_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationEntryImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_ENTRY_IMPL_H_