[Offline Pages] Two-step expiration in storage manager.

components/offline_pages/client_policy_controller.cc

Index: components/offline_pages/client_policy_controller.cc
diff --git a/components/offline_pages/client_policy_controller.cc b/components/offline_pages/client_policy_controller.cc
index cc3209c2988921dd7e6df321bb06c5638bda96bd..7e4fa597099c68d67eb805f709effe341ca488cd 100644
--- a/components/offline_pages/client_policy_controller.cc
+++ b/components/offline_pages/client_policy_controller.cc
@@ -40,7 +40,7 @@ const OfflinePageClientPolicy ClientPolicyController::MakePolicy(
     const std::string& name_space,
     LifetimeType lifetime_type,
     const base::TimeDelta& expire_period,
-    int page_limit) {
+    size_t page_limit) {
   OfflinePageClientPolicy policy(
       {name_space, {lifetime_type, expire_period, page_limit}});
   return policy;