Introduce a layering in the invalidation component as public and impl

components/invalidation/impl/ticl_settings_provider.cc

 // 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.
 
-#include "components/invalidation/ticl_settings_provider.h"
+#include "components/invalidation/impl/ticl_settings_provider.h"
 
 namespace invalidation {
 
 TiclSettingsProvider::Observer::~Observer() {
 }
 
 TiclSettingsProvider::TiclSettingsProvider() {
 }
 
 TiclSettingsProvider::~TiclSettingsProvider() {
 }
 
 void TiclSettingsProvider::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void TiclSettingsProvider::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void TiclSettingsProvider::FireOnUseGCMChannelChanged() {
   FOR_EACH_OBSERVER(Observer, observers_, OnUseGCMChannelChanged());
 }
 
 }  // namespace invalidation