Create the managed_node at the ChromeBookmarkClient.

chrome/browser/ui/views/bookmarks/bookmark_editor_view.cc

Index: chrome/browser/ui/views/bookmarks/bookmark_editor_view.cc
diff --git a/chrome/browser/ui/views/bookmarks/bookmark_editor_view.cc b/chrome/browser/ui/views/bookmarks/bookmark_editor_view.cc
index 4d4f36373a164403d6e391ee319c5e0b23cb8b80..d9be571cc4a67bcb79c9ba9af5f30f454e7bc39c 100644
--- a/chrome/browser/ui/views/bookmarks/bookmark_editor_view.cc
+++ b/chrome/browser/ui/views/bookmarks/bookmark_editor_view.cc
@@ -495,10 +495,10 @@ BookmarkEditorView::EditorNode* BookmarkEditorView::CreateRootNode() {
   EditorNode* root_node = new EditorNode(base::string16(), 0);
   const BookmarkNode* bb_root_node = bb_model_->root_node();
   CreateNodes(bb_root_node, root_node);
-  DCHECK(root_node->child_count() >= 2 && root_node->child_count() <= 3);
+  DCHECK(root_node->child_count() >= 2 && root_node->child_count() <= 4);
   DCHECK_EQ(BookmarkNode::BOOKMARK_BAR, bb_root_node->GetChild(0)->type());
   DCHECK_EQ(BookmarkNode::OTHER_NODE, bb_root_node->GetChild(1)->type());
-  if (root_node->child_count() == 3)
+  if (root_node->child_count() >= 3)
     DCHECK_EQ(BookmarkNode::MOBILE, bb_root_node->GetChild(2)->type());
   return root_node;
 }