[DRAFT] Create RenderFrameHostManager.

content/browser/frame_host/navigation_entry_impl.h

Index: content/browser/frame_host/navigation_entry_impl.h
diff --git a/content/browser/frame_host/navigation_entry_impl.h b/content/browser/frame_host/navigation_entry_impl.h
index 1149ae6ec5fb11162e6965b16dcfad9dca299a11..2cbb96aa6c102f426044a65b6b6cb619ea192d78 100644
--- a/content/browser/frame_host/navigation_entry_impl.h
+++ b/content/browser/frame_host/navigation_entry_impl.h
@@ -216,6 +216,13 @@ class CONTENT_EXPORT NavigationEntryImpl
     should_clear_history_list_ = should_clear_history_list;
   }
 
+  int64 frame_tree_node_id() const {
+    return frame_tree_node_id_;
+  }
+  void set_frame_tree_node_id(int64 frame_tree_node_id) {
+    frame_tree_node_id_ = frame_tree_node_id;
+  }
+
  private:
   // WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
   // Session/Tab restore save portions of this class so that it can be recreated
@@ -249,6 +256,10 @@ class CONTENT_EXPORT NavigationEntryImpl
   base::Time timestamp_;
   int http_status_code_;
 
+  // TODO(creis): Persist frame tree node ID.  This belongs on
+  // FrameNavigationEntry.
+  int64 frame_tree_node_id_;
+
   // This member is not persisted with session restore because it is transient.
   // If the post request succeeds, this field is cleared since the same
   // information is stored in |content_state_| above. It is also only shallow