Revert of Removing "All Bookmarks"

ios/chrome/browser/ui/bookmarks/bookmark_menu_view.mm

Index: ios/chrome/browser/ui/bookmarks/bookmark_menu_view.mm
diff --git a/ios/chrome/browser/ui/bookmarks/bookmark_menu_view.mm b/ios/chrome/browser/ui/bookmarks/bookmark_menu_view.mm
index 680ec47291b6d8279f86e3431da38409916e5fc0..bee854aeec5f5c32898e07f220afba19e70e08e4 100644
--- a/ios/chrome/browser/ui/bookmarks/bookmark_menu_view.mm
+++ b/ios/chrome/browser/ui/bookmarks/bookmark_menu_view.mm
@@ -137,12 +137,18 @@
       [[NSMutableArray alloc] init]);
   [self.menuItems addObject:topSection];
 
-  // Mobile bookmark is shown even if empty.
-  [topSection
-      addObject:[BookmarkMenuItem folderMenuItemForNode:mobileBookmarks
-                                           rootAncestor:mobileBookmarks]];
-  // Bookmarks Bar and Other Bookmarks are special folders and are shown at the
-  // top if they contain anything.
+  if (experimental_flags::IsAllBookmarksEnabled()) {
+    // All Items is always visible.
+    [topSection addObject:[BookmarkMenuItem allMenuItem]];
+  }
+  // Bookmarks Bar, Mobile Bookmarks and Other Bookmarks are special folders and
+  // are shown at the top if they contain anything.
+  if (!mobileBookmarks->empty() ||
+      !experimental_flags::IsAllBookmarksEnabled()) {
+    [topSection
+        addObject:[BookmarkMenuItem folderMenuItemForNode:mobileBookmarks
+                                             rootAncestor:mobileBookmarks]];
+  }
   if (!bookmarkBar->empty()) {
     [topSection addObject:[BookmarkMenuItem folderMenuItemForNode:bookmarkBar
                                                      rootAncestor:bookmarkBar]];
@@ -262,6 +268,15 @@
     return;
   }
 
+  if (node == self.primaryMenuItem.rootAncestor) {
+    // The deleted node is the root node of the current selected folder. Move to
+    // all items.
+    self.primaryMenuItem = [BookmarkMenuItem allMenuItem];
+    [self.delegate bookmarkMenuView:self selectedMenuItem:self.primaryMenuItem];
+    [self reloadData];
+    return;
+  }
+
   const BookmarkNode* root =
       RootLevelFolderForNode(parentFolder, self.bookmarkModel);
 
@@ -385,7 +400,8 @@
     shouldProcessInkTouchesAtTouchLocation:(CGPoint)location {
   NSIndexPath* indexPath = [self.tableView indexPathForRowAtPoint:location];
   BookmarkMenuItem* menuItem = [self menuItemAtIndexPath:indexPath];
-  return menuItem.type == bookmarks::MenuItemFolder;
+  return menuItem.type == bookmarks::MenuItemAll ||
+         menuItem.type == bookmarks::MenuItemFolder;
 }
 
 - (MDCInkView*)inkTouchController:(MDCInkTouchController*)inkTouchController