[Sync] Move //sync to //components/sync.

sync/util/extensions_activity.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/util/extensions_activity.h"
-
-namespace syncer {
-
-ExtensionsActivity::Record::Record()
-    : bookmark_write_count(0U) {}
-
-ExtensionsActivity::Record::~Record() {}
-
-ExtensionsActivity::ExtensionsActivity() {}
-
-ExtensionsActivity::~ExtensionsActivity() {}
-
-void ExtensionsActivity::GetAndClearRecords(Records* buffer) {
-  base::AutoLock lock(records_lock_);
-  buffer->clear();
-  buffer->swap(records_);
-}
-
-void ExtensionsActivity::PutRecords(const Records& records) {
-  base::AutoLock lock(records_lock_);
-  for (Records::const_iterator i = records.begin(); i != records.end(); ++i) {
-    records_[i->first].extension_id = i->second.extension_id;
-    records_[i->first].bookmark_write_count += i->second.bookmark_write_count;
-  }
-}
-
-void ExtensionsActivity::UpdateRecord(const std::string& extension_id) {
-  base::AutoLock lock(records_lock_);
-  Record& record = records_[extension_id];
-  record.extension_id = extension_id;
-  record.bookmark_write_count++;
-}
-
-}  // namespace syncer