Remove dependency on //chrome from bookmark_undo_utils

chrome/browser/undo/bookmark_undo_service_factory.cc

Index: chrome/browser/undo/bookmark_undo_service_factory.cc
diff --git a/chrome/browser/undo/bookmark_undo_service_factory.cc b/chrome/browser/undo/bookmark_undo_service_factory.cc
index 02fecaf24ce13c0d07b38df9445015c956cfe1cc..0f6cdc7ae07de4fc22bd64b63d9a29c693e4a1a8 100644
--- a/chrome/browser/undo/bookmark_undo_service_factory.cc
+++ b/chrome/browser/undo/bookmark_undo_service_factory.cc
@@ -16,6 +16,13 @@ BookmarkUndoService* BookmarkUndoServiceFactory::GetForProfile(
 }
 
 // static
+BookmarkUndoService* BookmarkUndoServiceFactory::GetForProfileIfExists(
+    Profile* profile) {
+  return static_cast<BookmarkUndoService*>(
+      GetInstance()->GetServiceForBrowserContext(profile, false));
+}
+
+// static
 BookmarkUndoServiceFactory* BookmarkUndoServiceFactory::GetInstance() {
   return Singleton<BookmarkUndoServiceFactory>::get();
 }