PrefixSet as an alternate to BloomFilter for safe-browsing.

chrome/browser/safe_browsing/safe_browsing_database.h

Index: chrome/browser/safe_browsing/safe_browsing_database.h
diff --git a/chrome/browser/safe_browsing/safe_browsing_database.h b/chrome/browser/safe_browsing/safe_browsing_database.h
index 4bd6db98ab5e87bf0c050980fd5967995a76b4fd..048c92a030e1b0331f4869a55e6f3b2557e736f1 100644
--- a/chrome/browser/safe_browsing/safe_browsing_database.h
+++ b/chrome/browser/safe_browsing/safe_browsing_database.h
@@ -20,6 +20,10 @@ namespace base {
   class Time;
 }
 
+namespace safe_browsing {
+class PrefixSet;
+}
+
 class BloomFilter;
 class GURL;
 class MessageLoop;
@@ -272,6 +276,9 @@ class SafeBrowsingDatabaseNew : public SafeBrowsingDatabase {
   // 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_