Protect against setting meta info on unmodifiable nodes.

chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc

Index: chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
diff --git a/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc b/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
index 82ca22dc080752a1cb0f377f39d9563323db3839..fea374a576afe2ff37ab3df1940bd58b7363800f 100644
--- a/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
+++ b/chrome/browser/extensions/api/bookmark_manager_private/bookmark_manager_private_api.cc
@@ -721,7 +721,15 @@ bool BookmarkManagerPrivateSetMetaInfoFunction::RunOnReady() {
   if (!node)
     return false;
 
+  if (!CanBeModified(node))
+    return false;
+
   BookmarkModel* model = BookmarkModelFactory::GetForProfile(GetProfile());
+  if (model->is_permanent_node(node)) {
+    error_ = bookmark_keys::kModifySpecialError;
+    return false;
+  }
+
   model->SetNodeMetaInfo(node, params->key, params->value);
   return true;
 }
@@ -735,7 +743,15 @@ bool BookmarkManagerPrivateUpdateMetaInfoFunction::RunOnReady() {
   if (!node)
     return false;
 
+  if (!CanBeModified(node))
+    return false;
+
   BookmarkModel* model = BookmarkModelFactory::GetForProfile(GetProfile());
+  if (model->is_permanent_node(node)) {
+    error_ = bookmark_keys::kModifySpecialError;
+    return false;
+  }
+
   BookmarkNode::MetaInfoMap new_meta_info(
       params->meta_info_changes.additional_properties);
   if (node->GetMetaInfoMap()) {