Record offline histograms with suffix via Histogram::FactoryGet

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>
 #include <string>
 
 #include "base/time/time.h"
 #include "components/offline_pages/offline_page_client_policy.h"
 
 namespace offline_pages {
 
-// Currently used for fallbacks like tests.
-static const char kDefaultNamespace[] = "default";
-
 // This is the class which is a singleton for offline page model
 // to get client policies based on namespaces.
 class ClientPolicyController {
  public:
   ClientPolicyController();
   ~ClientPolicyController();
 
   // Generates a client policy from the input values.
   static const OfflinePageClientPolicy MakePolicy(
       const std::string& name_space,
       LifetimePolicy::LifetimeType lifetime_type,
       const base::TimeDelta& expiration_period,
       size_t page_limit);
 
   // Get the client policy for |name_space|.
   const OfflinePageClientPolicy& GetPolicy(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_