PrefixSet as an alternate to BloomFilter for safe-browsing.

chrome/browser/safe_browsing/safe_browsing_database.h

 // Copyright (c) 2010 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 CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_DATABASE_H_
 #define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_DATABASE_H_
 #pragma once
 
 #include <set>
 #include <vector>
 
 #include "base/file_path.h"
 #include "base/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/task.h"
 #include "chrome/browser/safe_browsing/safe_browsing_store.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
 namespace base {
   class Time;
 }
 
+namespace safe_browsing {
+class PrefixSet;
+}
+
 class BloomFilter;
 class GURL;
 class MessageLoop;
 class SafeBrowsingDatabase;
 
 // Factory for creating SafeBrowsingDatabase. Tests implement this factory
 // to create fake Databases for testing.
 class SafeBrowsingDatabaseFactory {
  public:
   SafeBrowsingDatabaseFactory() { }
@@ skipping 232 matching lines @@
   // them every time.  Cleared on next update.
   std::set<SBPrefix> prefix_miss_cache_;
 
   // Used to schedule resetting the database because of corruption.
   ScopedRunnableMethodFactory<SafeBrowsingDatabaseNew> reset_factory_;
 
   // Set if corruption is detected during the course of an update.
   // Causes the update functions to fail with no side effects, until
   // the next call to |UpdateStarted()|.
   bool corruption_detected_;
+
+  // Used to check if a prefix was in the database.
+  scoped_ptr<safe_browsing::PrefixSet> prefix_set_;
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_DATABASE_H_