[Offline Pages] Add new download namespace

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 3289eac183bb2fa3f0265e6518a4a11a211448b2..2d03bec73451a3a55e1062e26530bfc5e3e35593 100644
--- a/components/offline_pages/client_policy_controller.cc
+++ b/components/offline_pages/client_policy_controller.cc
@@ -33,6 +33,13 @@ ClientPolicyController::ClientPolicyController() {
       MakePolicy(kCCTNamespace, LifetimeType::TEMPORARY,
                  base::TimeDelta::FromDays(2), kUnlimitedPages, 1)));
 
+  policies_.insert(std::make_pair(
+      kDownloadNamespace, MakePolicy(kDownloadNamespace,
+                                     LifetimeType::PERSISTENT,
+                                     base::TimeDelta::FromDays(0),
+                                     kUnlimitedPages,
+                                     kUnlimitedPages)));
+
   // Fallback policy.
   policies_.insert(std::make_pair(
       kDefaultNamespace, MakePolicy(kDefaultNamespace, LifetimeType::TEMPORARY,