Inject JSON parsing in WebResource as a callback rather than inheritance

chrome/browser/web_resource/promo_resource_service.h

 // Copyright 2012 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 CHROME_BROWSER_WEB_RESOURCE_PROMO_RESOURCE_SERVICE_H_
 #define CHROME_BROWSER_WEB_RESOURCE_PROMO_RESOURCE_SERVICE_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
 #include "base/callback_list.h"
 #include "base/memory/weak_ptr.h"
-#include "chrome/browser/web_resource/chrome_web_resource_service.h"
+#include "components/web_resource/web_resource_service.h"
 
 class NotificationPromo;
 class PrefRegistrySimple;
 class PrefService;
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace version_info {
 enum class Channel;
 }
 
 // A PromoResourceService fetches data from a web resource server to be used to
 // dynamically change the appearance of the New Tab Page. For example, it has
 // been used to fetch "tips" to be displayed on the NTP, or to display
 // promotional messages to certain groups of Chrome users.
-class PromoResourceService : public ChromeWebResourceService {
+class PromoResourceService : public web_resource::WebResourceService {
  public:
   using StateChangedCallbackList = base::CallbackList<void()>;
   using StateChangedSubscription = StateChangedCallbackList::Subscription;
 
   static void RegisterPrefs(PrefRegistrySimple* registry);
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
   static void MigrateUserPrefs(PrefService* user_prefs);
 
-  PromoResourceService(PrefService* local_state, version_info::Channel channel);
+  PromoResourceService(PrefService* local_state,
+                       version_info::Channel channel,
+                       const std::string& application_locale,
+                       net::URLRequestContextGetter* request_context,
+                       const char* disable_network_switch,
+                       const ParseJSONCallback& parse_json_callback);
   ~PromoResourceService() override;
 
   // Registers a callback called when the state of a web resource has been
   // changed. A resource may have been added, removed, or altered.
   scoped_ptr<StateChangedSubscription> RegisterStateChangedCallback(
       const base::Closure& closure);
 
  private:
   // Schedule a notification that a web resource is either going to become
   // available or be no longer valid.
@@ skipping 21 matching lines @@
 
   // Allows the creation of tasks to send a notification.
   // This allows the PromoResourceService to notify the New Tab Page immediately
   // when a new web resource should be shown or removed.
   base::WeakPtrFactory<PromoResourceService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PromoResourceService);
 };
 
 #endif  // CHROME_BROWSER_WEB_RESOURCE_PROMO_RESOURCE_SERVICE_H_