Implement new invalidations ack tracking system

chrome/browser/invalidation/p2p_invalidation_service.cc

 // Copyright (c) 2013 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 "chrome/browser/invalidation/p2p_invalidation_service.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/invalidation/invalidation_service_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 39 matching lines @@
     syncer::InvalidationHandler* handler,
     const syncer::ObjectIdSet& ids) {
   invalidator_->UpdateRegisteredIds(handler, ids);
 }
 
 void P2PInvalidationService::UnregisterInvalidationHandler(
     syncer::InvalidationHandler* handler) {
   invalidator_->UnregisterHandler(handler);
 }
 
-void P2PInvalidationService::AcknowledgeInvalidation(
-    const invalidation::ObjectId& id,
-    const syncer::AckHandle& ack_handle) {
-  invalidator_->Acknowledge(id, ack_handle);
-}
-
 void P2PInvalidationService::SendInvalidation(
     const syncer::ObjectIdSet& ids) {
   invalidator_->SendInvalidation(ids);
 }
 
 syncer::InvalidatorState P2PInvalidationService::GetInvalidatorState() const {
   return invalidator_->GetInvalidatorState();
 }
 
 std::string P2PInvalidationService::GetInvalidatorClientId() const {
   return invalidator_id_;
 }
 
 }  // namespace invalidation