Replace uses of hash_map in //base

components/leveldb_proto/testing/fake_db.h

 // Copyright 2014 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 COMPONENTS_LEVELDB_PROTO_TESTING_FAKE_DB_H_
 #define COMPONENTS_LEVELDB_PROTO_TESTING_FAKE_DB_H_
 
+#include <map>
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "components/leveldb_proto/proto_database.h"
 
 namespace leveldb_proto {
 namespace test {
 
 template <typename T>
 class FakeDB : public ProtoDatabase<T> {
   using Callback = base::Callback<void(bool)>;
 
  public:
-  using EntryMap = typename base::hash_map<std::string, T>;
+  using EntryMap = std::map<std::string, T>;
 
   explicit FakeDB(EntryMap* db);
   ~FakeDB() override;
 
   // ProtoDatabase implementation.
   void InitWithOptions(
       const char* client_name,
       const Options& options,
       const typename ProtoDatabase<T>::InitCallback& callback) override;
   void UpdateEntries(
@@ skipping 186 matching lines @@
 // static
 template <typename T>
 base::FilePath FakeDB<T>::DirectoryForTestDB() {
   return base::FilePath(FILE_PATH_LITERAL("/fake/path"));
 }
 
 }  // namespace test
 }  // namespace leveldb_proto
 
 #endif  // COMPONENTS_LEVELDB_PROTO_TESTING_FAKE_DB_H_