Implement the statistics table for the passwords.

components/password_manager/core/browser/mock_password_store.h

Index: components/password_manager/core/browser/mock_password_store.h
diff --git a/components/password_manager/core/browser/mock_password_store.h b/components/password_manager/core/browser/mock_password_store.h
index 70f54e915850d6db833ece5a7e1e41395f3d6b95..7b76b91822ed48fd9ecdd4f9efc04184966e6e3d 100644
--- a/components/password_manager/core/browser/mock_password_store.h
+++ b/components/password_manager/core/browser/mock_password_store.h
@@ -47,6 +47,12 @@ class MockPasswordStore : public PasswordStore {
   MOCK_METHOD1(FillBlacklistLogins,
                bool(ScopedVector<autofill::PasswordForm>*));
   MOCK_METHOD1(NotifyLoginsChanged, void(const PasswordStoreChangeList&));
+  void AddSiteStatsImpl(const InteractionsStats& stats) override {}
+  void RemoveSiteStatsImpl(const GURL& origin_domain) override {}
+  scoped_ptr<InteractionsStats> GetSiteStatsImpl(
+      const GURL& origin_domain) override {
+    return scoped_ptr<InteractionsStats>();
+  }
 
   PasswordStoreSync* GetSyncInterface() { return this; }