Set metainfo ID for enhanced bookmarks extension

components/bookmarks/browser/bookmark_model_observer.h

Index: components/bookmarks/browser/bookmark_model_observer.h
diff --git a/components/bookmarks/browser/bookmark_model_observer.h b/components/bookmarks/browser/bookmark_model_observer.h
index f3e1f9a52a11ba117083e4b29e3c52f336f0b461..11504e94d73f9e728f6febf721cdb24891dc93c8 100644
--- a/components/bookmarks/browser/bookmark_model_observer.h
+++ b/components/bookmarks/browser/bookmark_model_observer.h
@@ -29,6 +29,12 @@ class BookmarkModelObserver {
                                  const BookmarkNode* new_parent,
                                  int new_index) = 0;
 
+  // Invoked prior to adding a bookmark node, and in particular, prior to adding
+  // it to the parent. This function can be used to alter the contents of the
+  // node before BookmarkNodeAdded listeners know about it.
+  virtual void OnWillAddBookmarkNode(BookmarkModel* model,
+                                     BookmarkNode* node) {}
+
   // Invoked when a node has been added.
   virtual void BookmarkNodeAdded(BookmarkModel* model,
                                  const BookmarkNode* parent,