Implement new invalidations ack tracking system

sync/notifier/object_id_invalidation_map.cc

 // Copyright 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 "sync/notifier/object_id_invalidation_map.h"
 
 #include "base/json/json_string_value_serializer.h"
 
 namespace syncer {
 
@@ skipping 46 matching lines @@
   DCHECK(!lookup->second.IsEmpty());
   return lookup->second;
 }
 
 void ObjectIdInvalidationMap::GetAllInvalidations(
     std::vector<syncer::Invalidation>* out) const {
   for (IdToListMap::const_iterator it = map_.begin(); it != map_.end(); ++it) {
     out->insert(out->begin(), it->second.begin(), it->second.end());
   }
 }
+void ObjectIdInvalidationMap::AcknowledgeAll() const {
+  for (IdToListMap::const_iterator it1 = map_.begin();
+       it1 != map_.end(); ++it1) {
+    for (SingleObjectInvalidationSet::const_iterator it2 = it1->second.begin();
+         it2 != it1->second.end(); ++it2) {
+      it2->Acknowledge();
+    }
+  }
+}
 
 bool ObjectIdInvalidationMap::operator==(
     const ObjectIdInvalidationMap& other) const {
   return map_ == other.map_;
 }
 
 scoped_ptr<base::ListValue> ObjectIdInvalidationMap::ToValue() const {
   scoped_ptr<base::ListValue> value(new base::ListValue());
   for (IdToListMap::const_iterator it1 = map_.begin();
        it1 != map_.end(); ++it1) {
@@ skipping 26 matching lines @@
   JSONStringValueSerializer serializer(&output);
   serializer.set_pretty_print(true);
   serializer.Serialize(*ToValue().get());
   return output;
 }
 
 ObjectIdInvalidationMap::ObjectIdInvalidationMap(const IdToListMap& map)
   : map_(map) {}
 
 }  // namespace syncer