Keep All Bookmarks panel visible by default.

ios/chrome/browser/experimental_flags.mm

Index: ios/chrome/browser/experimental_flags.mm
diff --git a/ios/chrome/browser/experimental_flags.mm b/ios/chrome/browser/experimental_flags.mm
index 9218e898a40d629ddfbf52486cbba7aba606a721..1081ddd752fcbbd8eadbe1520658aea7e5ed58e3 100644
--- a/ios/chrome/browser/experimental_flags.mm
+++ b/ios/chrome/browser/experimental_flags.mm
@@ -110,10 +110,13 @@ bool IsAllBookmarksEnabled() {
     return false;
   }
 
-  // Check if the finch experiment is turned on. Flag is off by default.
+  // Check if the finch experiment exists.
   std::string group_name =
       base::FieldTrialList::FindFullName("RemoveAllBookmarks");
 
+  if (group_name.empty()) {
+    return true;  // If no finch experiment, keep all bookmarks enabled.
+  }
   return base::StartsWith(group_name, "Enabled",
                           base::CompareCase::INSENSITIVE_ASCII);
 }