Makes all permanent nodes share the same node class so that visibility

chrome/browser/bookmarks/bookmark_model.h

Index: chrome/browser/bookmarks/bookmark_model.h
diff --git a/chrome/browser/bookmarks/bookmark_model.h b/chrome/browser/bookmarks/bookmark_model.h
index 1b7eec89d94bb91ed47498a2a84870eb9517c659..7fb4faaab313dc4cff017c58433be0638ba0d467 100644
--- a/chrome/browser/bookmarks/bookmark_model.h
+++ b/chrome/browser/bookmarks/bookmark_model.h
@@ -158,6 +158,26 @@ class BookmarkNode : public ui::TreeNode<BookmarkNode> {
   DISALLOW_COPY_AND_ASSIGN(BookmarkNode);
 };
 
+// BookmarkPermanentNode -------------------------------------------------------
+
+// Node used for the permanent folders (excluding the root).
+class BookmarkPermanentNode : public BookmarkNode {
+ public:
+  explicit BookmarkPermanentNode(int64 id);
+  virtual ~BookmarkPermanentNode();
+
+  // WARNING: this code is used for other projects. Contact noyau@ for details.
+  void set_visible(bool value) { visible_ = value; }
+
+  // BookmarkNode overrides:
+  virtual bool IsVisible() const OVERRIDE;
+
+ private:
+  bool visible_;
+
+  DISALLOW_COPY_AND_ASSIGN(BookmarkPermanentNode);
+};
+
 // BookmarkModel --------------------------------------------------------------
 
 // BookmarkModel provides a directed acyclic graph of URLs and folders.
@@ -382,7 +402,7 @@ class BookmarkModel : public content::NotificationObserver,
 
   // Creates one of the possible permanent nodes (bookmark bar node, other node
   // and mobile node) from |type|.
-  BookmarkNode* CreatePermanentNode(BookmarkNode::Type type);
+  BookmarkPermanentNode* CreatePermanentNode(BookmarkNode::Type type);
 
   // Notification that a favicon has finished loading. If we can decode the
   // favicon, FaviconLoaded is invoked.
@@ -431,9 +451,9 @@ class BookmarkModel : public content::NotificationObserver,
   // children.
   BookmarkNode root_;
 
-  BookmarkNode* bookmark_bar_node_;
-  BookmarkNode* other_node_;
-  BookmarkNode* mobile_node_;
+  BookmarkPermanentNode* bookmark_bar_node_;
+  BookmarkPermanentNode* other_node_;
+  BookmarkPermanentNode* mobile_node_;
 
   // The maximum ID assigned to the bookmark nodes in the model.
   int64 next_node_id_;