[New CL] Add a tab helper to record the last visit date for each bookmark

chrome/browser/bookmarks/bookmark_model_factory.cc

Index: chrome/browser/bookmarks/bookmark_model_factory.cc
diff --git a/chrome/browser/bookmarks/bookmark_model_factory.cc b/chrome/browser/bookmarks/bookmark_model_factory.cc
index 8a6edc16323b706358fdb6b03b5a13b8d914714c..89f159f67ec24cc2be6149e0a4e6de41dc4ce486 100644
--- a/chrome/browser/bookmarks/bookmark_model_factory.cc
+++ b/chrome/browser/bookmarks/bookmark_model_factory.cc
@@ -29,6 +29,20 @@
 using bookmarks::BookmarkModel;
 
 // static
+BookmarkModel* BookmarkModelFactory::GetForBrowserContext(
+    content::BrowserContext* browser_context) {
+  return static_cast<BookmarkModel*>(
+      GetInstance()->GetServiceForBrowserContext(browser_context, true));
+}
+
+// static
+BookmarkModel* BookmarkModelFactory::GetForBrowserContextIfExists(
+    content::BrowserContext* browser_context) {
+  return static_cast<BookmarkModel*>(
+      GetInstance()->GetServiceForBrowserContext(browser_context, false));
+}
+
+// static
 BookmarkModel* BookmarkModelFactory::GetForProfile(Profile* profile) {
   return static_cast<BookmarkModel*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));