Each DatabaseManager gets to decide which stores to track

components/safe_browsing_db/v4_local_database_manager_unittest.cc

 // Copyright 2016 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.
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
 #include "base/test/test_simple_task_runner.h"
 #include "components/safe_browsing_db/v4_database.h"
 #include "components/safe_browsing_db/v4_local_database_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/url_request/test_url_fetcher_factory.h"
 #include "testing/platform_test.h"
 
 namespace safe_browsing {
 
 class FakeV4Database : public V4Database {
  public:
   FakeV4Database(const scoped_refptr<base::SequencedTaskRunner>& db_task_runner,
                  std::unique_ptr<StoreMap> store_map,
                  const StoreAndHashPrefixes& store_and_hash_prefixes)
       : V4Database(db_task_runner, std::move(store_map)),
         store_and_hash_prefixes_(store_and_hash_prefixes) {}
 
   void GetStoresMatchingFullHash(
       const FullHash& full_hash,
-      const base::hash_set<UpdateListIdentifier>& stores_to_look,
+      const std::unordered_set<UpdateListIdentifier>& stores_to_look,
       StoreAndHashPrefixes* store_and_hash_prefixes) override {
     *store_and_hash_prefixes = store_and_hash_prefixes_;
   }
 
  private:
   const StoreAndHashPrefixes& store_and_hash_prefixes_;
 };
 
 class V4LocalDatabaseManagerTest : public PlatformTest {
  public:
@@ skipping 91 matching lines @@
 
   // The same URL returns |false| in the previous test because
   // v4_local_database_manager_ is enabled.
   ForceDisableLocalDatabaseManager();
 
   EXPECT_TRUE(v4_local_database_manager_->CheckBrowseUrl(
       GURL("http://example.com/a/"), nullptr));
 }
 
 }  // namespace safe_browsing