Replace QuicheUnorderedMap with absl::node_hash_map.

PiperOrigin-RevId: 355704903
Change-Id: I0fcc20b247d31949c7b21a2690da9eaaafbeac71

common/platform/api/quiche_unordered_containers.h

diff --git a/common/platform/api/quiche_unordered_containers.h b/common/platform/api/quiche_unordered_containers.h
deleted file mode 100644
index a53a206..0000000
--- a/common/platform/api/quiche_unordered_containers.h
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) 2019 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.
-
-#ifndef QUICHE_COMMON_PLATFORM_API_QUICHE_UNORDERED_CONTAINERS_H_
-#define QUICHE_COMMON_PLATFORM_API_QUICHE_UNORDERED_CONTAINERS_H_
-
-#include <functional>
-
-#include "net/quiche/common/platform/impl/quiche_unordered_containers_impl.h"
-
-namespace quiche {
-
-// The default hasher used by hash tables.
-template <typename Key>
-using QuicheDefaultHasher = QuicheDefaultHasherImpl<Key>;
-
-// A general-purpose unordered map.
-template <typename Key,
-          typename Value,
-          typename Hash = QuicheDefaultHasher<Key>,
-          typename Eq = std::equal_to<Key>>
-using QuicheUnorderedMap = QuicheUnorderedMapImpl<Key, Value, Hash, Eq>;
-
-}  // namespace quiche
-
-#endif  // QUICHE_COMMON_PLATFORM_API_QUICHE_UNORDERED_CONTAINERS_H_

common/simple_linked_hash_map.h

diff --git a/common/simple_linked_hash_map.h b/common/simple_linked_hash_map.h
index 48da55b..17542a1 100644
--- a/common/simple_linked_hash_map.h
+++ b/common/simple_linked_hash_map.h
@@ -22,8 +22,8 @@
 #include <type_traits>
 #include <utility>
 
+#include "absl/container/node_hash_map.h"
 #include "common/platform/api/quiche_logging.h"
-#include "common/platform/api/quiche_unordered_containers.h"
 
 namespace quiche {
 
@@ -41,7 +41,7 @@
 class SimpleLinkedHashMap {
  private:
   typedef std::list<std::pair<Key, Value>> ListType;
-  typedef QuicheUnorderedMap<Key, typename ListType::iterator, Hash, Eq>
+  typedef absl::node_hash_map<Key, typename ListType::iterator, Hash, Eq>
       MapType;
 
  public: