[invalidation] Componentize TiclProfileSettingsProvider

components/invalidation/impl/profile_invalidation_provider.h

 // Copyright 2014 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_INVALIDATION_IMPL_PROFILE_INVALIDATION_PROVIDER_H_
 #define COMPONENTS_INVALIDATION_IMPL_PROFILE_INVALIDATION_PROVIDER_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/keyed_service/core/keyed_service.h"
 
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
 namespace invalidation {
 
 class InvalidationService;
 
 // A KeyedService that owns an InvalidationService.
 class ProfileInvalidationProvider : public KeyedService {
  public:
   explicit ProfileInvalidationProvider(
       scoped_ptr<InvalidationService> invalidation_service);
   ~ProfileInvalidationProvider() override;
 
   InvalidationService* GetInvalidationService();
 
   // KeyedService:
   void Shutdown() override;
 
+  // Register prefs to be used by per-Profile instances of this class which
+  // store invalidation state in Profile prefs.
+  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
+
  private:
   scoped_ptr<InvalidationService> invalidation_service_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileInvalidationProvider);
 };
 
 }  // namespace invalidation
 
 #endif  // COMPONENTS_INVALIDATION_IMPL_PROFILE_INVALIDATION_PROVIDER_H_