[Sync] Move sessions/ to engine/cycle/ and rename things to match.

components/sync/sessions/update_counters.cc

Index: components/sync/sessions/update_counters.cc
diff --git a/components/sync/sessions/update_counters.cc b/components/sync/sessions/update_counters.cc
deleted file mode 100644
index a63c2c1fbb65d5d01ce946c76c6b6bb98e31ea9f..0000000000000000000000000000000000000000
--- a/components/sync/sessions/update_counters.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// 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/sync/sessions/update_counters.h"
-
-#include "base/json/json_string_value_serializer.h"
-#include "base/values.h"
-
-namespace syncer {
-
-UpdateCounters::UpdateCounters()
-    : num_updates_received(0),
-      num_reflected_updates_received(0),
-      num_tombstone_updates_received(0),
-      num_updates_applied(0),
-      num_hierarchy_conflict_application_failures(0),
-      num_encryption_conflict_application_failures(0),
-      num_server_overwrites(0),
-      num_local_overwrites(0) {}
-
-UpdateCounters::~UpdateCounters() {}
-
-std::unique_ptr<base::DictionaryValue> UpdateCounters::ToValue() const {
-  std::unique_ptr<base::DictionaryValue> value(new base::DictionaryValue());
-
-  value->SetInteger("numUpdatesReceived", num_updates_received);
-  value->SetInteger("numReflectedUpdatesReceived",
-                    num_reflected_updates_received);
-  value->SetInteger("numTombstoneUpdatesReceived",
-                    num_tombstone_updates_received);
-
-  value->SetInteger("numUpdatesApplied", num_updates_applied);
-  value->SetInteger("numHierarchyConflictApplicationFailures",
-                    num_hierarchy_conflict_application_failures);
-  value->SetInteger("numEncryptionConflictApplicationFailures",
-                    num_encryption_conflict_application_failures);
-
-  value->SetInteger("numServerOverwrites", num_server_overwrites);
-  value->SetInteger("numLocalOverwrites", num_local_overwrites);
-
-  return value;
-}
-
-std::string UpdateCounters::ToString() const {
-  std::string result;
-  std::unique_ptr<base::DictionaryValue> value = ToValue();
-  JSONStringValueSerializer serializer(&result);
-  serializer.Serialize(*value);
-  return result;
-}
-
-}  // namespace syncer