Moved BrowsingDataCounter and part of BrowsingDataCounterUtils to components.

components/browsing_data/pref_names.cc

+// Copyright 2016 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/browsing_data/pref_names.h"
+
+namespace browsing_data {
+
+namespace prefs {
+
+// Clear browsing data delete time period
+const char kDeleteTimePeriod[] = "browser.clear_data.time_period";
+
+}  // namespace prefs
+
+}  // namespace browsing_data