tree 276da6ffa1ff60bb9a775e17508837ac0dac4373
parent 797df387650ee57b729663d59ca4a7a4ccb3817e
author birenroy <birenroy@google.com> 1787029230 -0700
committer Copybara-Service <copybara-worker@google.com> 1787029257 -0700

Transitions `QuicheLinkedHashMap` to use `StableBlockList` as its list type and implements flag protection.

This CL wraps the underlying list in `QuicheLinkedHashMap` in a `std::variant`
to support both `std::list` and `StableBlockList` implementations,
guarded by the reloadable flag `gfe2_reloadable_flag_quiche_linked_hash_map_use_stable_block_list`.

Tested:
- `//third_party/quiche/common:quiche_linked_hash_map_test`
- `//gfe/gfe2:quiche_feature_flags_test`
- `//third_party/quiche/common/...`

Protected by quic_reloadable_flag_quiche_linked_hash_map_use_stable_block_list.

PiperOrigin-RevId: 966366233