Revert of Removing "All Bookmarks"

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

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/ui/bookmarks/bookmark_utils_ios.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
@@ skipping 608 matching lines @@
 #pragma mark - Cache position in collection view.
 
 void CachePosition(CGFloat position, BookmarkMenuItem* item) {
   BookmarkPositionCache* cache = nil;
   switch (item.type) {
     case bookmarks::MenuItemFolder:
       cache = [BookmarkPositionCache
           cacheForMenuItemFolderWithPosition:position
                                     folderId:item.folder->id()];
       break;
+    case bookmarks::MenuItemAll:
+      cache = [BookmarkPositionCache cacheForMenuItemAllWithPosition:position];
+      break;
     case bookmarks::MenuItemDivider:
     case bookmarks::MenuItemSectionHeader:
       NOTREACHED();
       break;
   }
 
   // TODO(crbug.com/388789): remove the use of NSUserDefaults.
   NSData* data = [NSKeyedArchiver archivedDataWithRootObject:cache];
   [[NSUserDefaults standardUserDefaults] setObject:data
                                             forKey:kPositionCacheKey];
@@ skipping 10 matching lines @@
   NSData* data =
       [[NSUserDefaults standardUserDefaults] objectForKey:kPositionCacheKey];
   if (!data || ![data isKindOfClass:[NSData class]])
     return NO;
   BookmarkPositionCache* cache =
       [NSKeyedUnarchiver unarchiveObjectWithData:data];
   if (!cache)
     return NO;
 
   switch (cache.type) {
+    case bookmarks::MenuItemAll:
+      if (!experimental_flags::IsAllBookmarksEnabled())
+        return NO;
+      *item = [BookmarkMenuItem allMenuItem];
+      break;
     case bookmarks::MenuItemFolder: {
       const BookmarkNode* bookmark = FindFolderById(model, cache.folderId);
       if (!bookmark)
         return NO;
       const BookmarkNode* parent = RootLevelFolderForNode(bookmark, model);
       if (!parent)
         parent = bookmark;
       *item =
           [BookmarkMenuItem folderMenuItemForNode:bookmark rootAncestor:parent];
       break;
     }
     case bookmarks::MenuItemDivider:
     case bookmarks::MenuItemSectionHeader:
       NOTREACHED();
       return NO;
   }
 
   *position = cache.position;
   return YES;
 }
 
 void ClearPositionCache() {
   [[NSUserDefaults standardUserDefaults] removeObjectForKey:kPositionCacheKey];
 }
 
 }  // namespace bookmark_utils_ios