Implement the statistics table for the passwords.

chrome/browser/password_manager/password_store_mac.h

Index: chrome/browser/password_manager/password_store_mac.h
diff --git a/chrome/browser/password_manager/password_store_mac.h b/chrome/browser/password_manager/password_store_mac.h
index 60a7a6c4e8f6c0be139459ea41abc5617599d0a9..172cda125f4c60f8ba3b5290bf749fa7569c5971 100644
--- a/chrome/browser/password_manager/password_store_mac.h
+++ b/chrome/browser/password_manager/password_store_mac.h
@@ -86,6 +86,11 @@ class PasswordStoreMac : public password_manager::PasswordStore {
       ScopedVector<autofill::PasswordForm>* forms) override;
   bool FillBlacklistLogins(
       ScopedVector<autofill::PasswordForm>* forms) override;
+  void AddSiteStatsImpl(
+      const password_manager::InteractionsStats& stats) override;
+  void RemoveSiteStatsImpl(const GURL& origin_domain) override;
+  scoped_ptr<password_manager::InteractionsStats> GetSiteStatsImpl(
+      const GURL& origin_domain) override;
 
   // Adds the given form to the Keychain if it's something we want to store
   // there (i.e., not a blacklist entry). Returns true if the operation