Introduce a layering in the invalidation component as public and impl

components/invalidation/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_PROFILE_INVALIDATION_PROVIDER_H_
-#define COMPONENTS_INVALIDATION_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 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;
-
- private:
-  scoped_ptr<InvalidationService> invalidation_service_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProfileInvalidationProvider);
-};
-
-}  // namespace invalidation
-
-#endif  // COMPONENTS_INVALIDATION_PROFILE_INVALIDATION_PROVIDER_H_