Revert of Removing "All Bookmarks"

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

Index: ios/chrome/browser/ui/bookmarks/bookmark_position_cache.mm
diff --git a/ios/chrome/browser/ui/bookmarks/bookmark_position_cache.mm b/ios/chrome/browser/ui/bookmarks/bookmark_position_cache.mm
index 51fdd984947bca708c8769efe112f4ecde131e14..7d5e7f1f524c8b6ee707f883c0e8e6626abf686d 100644
--- a/ios/chrome/browser/ui/bookmarks/bookmark_position_cache.mm
+++ b/ios/chrome/browser/ui/bookmarks/bookmark_position_cache.mm
@@ -43,6 +43,13 @@
 
 #pragma mark - Public Constructors
 
++ (BookmarkPositionCache*)cacheForMenuItemAllWithPosition:(CGFloat)position {
+  return [[[BookmarkPositionCache alloc]
+      initWithFolderId:0
+              position:position
+                  type:bookmarks::MenuItemAll] autorelease];
+}
+
 + (BookmarkPositionCache*)cacheForMenuItemFolderWithPosition:(CGFloat)position
                                                     folderId:(int64_t)folderId {
   return [[[BookmarkPositionCache alloc]
@@ -84,6 +91,7 @@
     return NO;
   switch (self.type) {
     case bookmarks::MenuItemDivider:
+    case bookmarks::MenuItemAll:
     case bookmarks::MenuItemSectionHeader:
       return YES;
     case bookmarks::MenuItemFolder: