Moved BrowsingDataCounter and part of BrowsingDataCounterUtils to components.

components/browsing_data/browsing_data_utils.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/browsing_data_utils.h"
+
+namespace browsing_data {
+
+base::Time CalculateBeginDeleteTime(TimePeriod time_period) {
+  base::TimeDelta diff;
+  base::Time delete_begin_time = base::Time::Now();
+  switch (time_period) {
+    case LAST_HOUR:
+      diff = base::TimeDelta::FromHours(1);
+      break;
+    case LAST_DAY:
+      diff = base::TimeDelta::FromHours(24);
+      break;
+    case LAST_WEEK:
+      diff = base::TimeDelta::FromHours(7 * 24);
+      break;
+    case FOUR_WEEKS:
+      diff = base::TimeDelta::FromHours(4 * 7 * 24);
+      break;
+    case EVERYTHING:
+      delete_begin_time = base::Time();
+      break;
+  }
+  return delete_begin_time - diff;
+}
+
+}  // namespace browsing_data