Revert of Removing "All Bookmarks"

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

Index: ios/chrome/browser/ui/bookmarks/bookmark_utils_ios_unittest.mm
diff --git a/ios/chrome/browser/ui/bookmarks/bookmark_utils_ios_unittest.mm b/ios/chrome/browser/ui/bookmarks/bookmark_utils_ios_unittest.mm
index d9ec4ef5f88a1dddfd7763591360a72e6b23966b..841affa3125823e4d66996bb0624798e37d441a2 100644
--- a/ios/chrome/browser/ui/bookmarks/bookmark_utils_ios_unittest.mm
+++ b/ios/chrome/browser/ui/bookmarks/bookmark_utils_ios_unittest.mm
@@ -178,17 +178,29 @@
 }
 
 TEST_F(BookmarkIOSUtilsUnitTest, TestPositionCache) {
-  // Try to store and retrieve a cache for the folderMenuItem.
-  const BookmarkNode* mobileNode = _bookmarkModel->mobile_node();
-  const BookmarkNode* f1 = AddFolder(mobileNode, @"f1");
-  BookmarkMenuItem* item =
-      [BookmarkMenuItem folderMenuItemForNode:f1 rootAncestor:NULL];
+  // Try to store and retrieve a cache for the allMenuItem.
+  BookmarkMenuItem* item = [BookmarkMenuItem allMenuItem];
   CGFloat position = 23;
   bookmark_utils_ios::CachePosition(position, item);
-  BookmarkMenuItem* outItem = nil;
   CGFloat outPosition;
+  BookmarkMenuItem* outItem;
   BOOL result = bookmark_utils_ios::GetPositionCache(_bookmarkModel, &outItem,
                                                      &outPosition);
+  if (experimental_flags::IsAllBookmarksEnabled()) {
+    ASSERT_TRUE(result);
+    EXPECT_NSEQ(item, outItem);
+    EXPECT_NEAR(position, outPosition, 0.01);
+  } else {
+    ASSERT_FALSE(result);
+  }
+
+  // Try to store and retrieve a cache for the folderMenuItem.
+  const BookmarkNode* mobileNode = _bookmarkModel->mobile_node();
+  const BookmarkNode* f1 = AddFolder(mobileNode, @"f1");
+  item = [BookmarkMenuItem folderMenuItemForNode:f1 rootAncestor:NULL];
+  bookmark_utils_ios::CachePosition(position, item);
+  result = bookmark_utils_ios::GetPositionCache(_bookmarkModel, &outItem,
+                                                &outPosition);
   ASSERT_TRUE(result);
   EXPECT_NSEQ(item, outItem);
   EXPECT_NEAR(position, outPosition, 0.01);