[Offline pages] Add a builder and feature struct to policy

components/offline_pages/client_policy_controller.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_OFFLINE_PAGES_CLIENT_POLICY_CONTROLLER_H_
 #define COMPONENTS_OFFLINE_PAGES_CLIENT_POLICY_CONTROLLER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 15 matching lines @@
   static const OfflinePageClientPolicy MakePolicy(
       const std::string& name_space,
       LifetimePolicy::LifetimeType lifetime_type,
       const base::TimeDelta& expiration_period,
       size_t page_limit,
       size_t pages_allowed_per_url);
 
   // Get the client policy for |name_space|.
   const OfflinePageClientPolicy& GetPolicy(const std::string& name_space) const;
 
+  // Returns whether the policy for |name_space| is user requested.

[fgorski, 2016/09/07 03:25:05]

Returns whether offline pages belonging to |name_space| are removed when cache
is being reset by user.

[chili, 2016/09/12 17:39:00]

Done.

+  bool IsRemovedOnCacheReset(const std::string& name_space) const;
+
+  // Returns whether the policy for |name_space| is downloaded.

[fgorski, 2016/09/07 03:25:05]

Returns whether offline pages belonging to |name_space| are shown in downloads
UI.

[chili, 2016/09/12 17:39:00]

Done.

+  bool IsSupportedByDownload(const std::string& name_space) const;
+
  private:
   // The map from name_space to a client policy. Will be generated
   // as pre-defined values for now.
   std::map<std::string, OfflinePageClientPolicy> policies_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientPolicyController);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CLIENT_POLICY_CONTROLLER_H_