[DRAFT] Create RenderFrameHostManager.

content/browser/frame_host/frame_tree.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_FRAME_TREE_H_
 #define CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 16 matching lines @@
 // all FrameTreeNodes will be created/deleted in response to frame attach and
 // detach events in the DOM.
 //
 // The main frame's FrameTreeNode is special in that it is reused. This allows
 // it to serve as an anchor for state that needs to persist across top-level
 // page navigations.
 //
 // TODO(ajwong): Move NavigationController ownership to the main frame
 // FrameTreeNode. Possibly expose access to it from here.
 //
-// TODO(ajwong): Currently this class only contains FrameTreeNodes for
-// subframes if the --site-per-process flag is enabled.
-//
 // This object is only used on the UI thread.
 class CONTENT_EXPORT FrameTree {
  public:
   // Each FrameTreeNode will default to using the given |navigator| for
   // navigation tasks in the frame.
   // A set of delegates are remembered here so that we can create
   // RenderFrameHostManagers.
   // TODO(creis): This set of delegates will change as we move things to
   // Navigator.
   FrameTree(Navigator* navigator,
             RenderFrameHostDelegate* render_frame_delegate,
             RenderViewHostDelegate* render_view_delegate,
             RenderWidgetHostDelegate* render_widget_delegate,
             RenderFrameHostManager::Delegate* manager_delegate);
   ~FrameTree();
 
   FrameTreeNode* root() const { return root_.get(); }
 
   // Returns the FrameTreeNode with the given |frame_tree_node_id|.
   FrameTreeNode* FindByID(int64 frame_tree_node_id);
 
   // Executes |on_node| on each node in the frame tree.  If |on_node| returns
   // false, terminates the iteration immediately. Returning false is useful
   // if |on_node| is just doing a search over the tree.
   void ForEach(const base::Callback<bool(FrameTreeNode*)>& on_node) const;
 
-  // After the FrameTree is created, or after SwapMainFrame() has been called,
-  // the root node does not yet have a frame id. This is allocated by the
-  // renderer and is published to the browser process on the first navigation
-  // after a swap. These two functions are used to set the root node's frame
-  // id.
-  //
-  // TODO(ajwong): Remove these once RenderFrameHost's routing id replaces
-  // frame_id.
-  bool IsFirstNavigationAfterSwap() const;
-  void OnFirstNavigationAfterSwap(int main_frame_id);
-
   // Frame tree manipulation routines.
   // TODO(creis): These should take in RenderFrameHost routing IDs.
-  RenderFrameHostImpl* AddFrame(int frame_routing_id,
-                                int64 parent_frame_tree_node_id,
+  RenderFrameHostImpl* AddFrame(RenderViewHostImpl* parent_render_view_host,
+                                int frame_routing_id,
+                                int64 parent_frame_id,
                                 int64 frame_id,
                                 const std::string& frame_name);
+  // TODO(creis): Remove |frame_id|.
   void RemoveFrame(RenderFrameHostImpl* render_frame_host,
-                   int64 parent_frame_id,
+                   int64 parent_frame_tree_node_id,
+                   int64 frame_tree_node_id,
                    int64 frame_id);
-  void SetFrameUrl(int64 frame_id, const GURL& url);
+  void SetFrameUrl(int64 frame_tree_node_id, const GURL& url);
 
   // Clears process specific-state after a main frame process swap.
   // This destroys most of the frame tree but retains the root node so that
   // navigation state may be kept on it between process swaps. Used to
   // support bookkeeping for top-level navigations.
   // TODO(creis): Look into how we can remove the need for this method.
   void ResetForMainFrameSwap();
 
   // Convenience accessor for the main frame's RenderFrameHostImpl.
   RenderFrameHostImpl* GetMainFrame() const;
@@ skipping 55 matching lines @@
   scoped_ptr<FrameTreeNode> root_;
 
   base::Callback<void(RenderViewHostImpl*, int64)> on_frame_removed_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameTree);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_FRAME_TREE_H_