Only assign enhanced bookmarks metainfo ID if not already present

chrome/browser/extensions/api/bookmarks/bookmarks_api.cc

Index: chrome/browser/extensions/api/bookmarks/bookmarks_api.cc
diff --git a/chrome/browser/extensions/api/bookmarks/bookmarks_api.cc b/chrome/browser/extensions/api/bookmarks/bookmarks_api.cc
index 06b023eef882f7838902e2bace1d08264c15a1d3..ce3835296c163d465699b7c6811576d70e4b28ef 100644
--- a/chrome/browser/extensions/api/bookmarks/bookmarks_api.cc
+++ b/chrome/browser/extensions/api/bookmarks/bookmarks_api.cc
@@ -355,7 +355,9 @@ void BookmarkEventRouter::OnWillAddBookmarkNode(BookmarkModel* model,
   if (IsEnhancedBookmarksExtensionActive(Profile::FromBrowserContext(
           browser_context_))) {
     static const char key[] = "stars.id";
-    node->SetMetaInfo(key, GenerateEnhancedBookmarksID(node->is_folder()));
+    std::string value;
+    if (!node->GetMetaInfo(key, &value))
+      node->SetMetaInfo(key, GenerateEnhancedBookmarksID(node->is_folder()));
   }
 }