[TTS] Record CTR by week and 28-day intervals.

components/contextual_search/browser/ctr_aggregator.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/contextual_search/browser/ctr_aggregator.h"
 
 #include "base/numerics/safe_conversions.h"
 #include "base/time/time.h"
 
 namespace {
@@ skipping 26 matching lines @@
 
 CTRAggregator::~CTRAggregator() {}
 
 void CTRAggregator::RecordImpression(bool did_click) {
   storage_.WriteImpressions(week_number_,
                             1 + storage_.ReadImpressions(week_number_));
   if (did_click)
     storage_.WriteClicks(week_number_, 1 + storage_.ReadClicks(week_number_));
 }
 
+int CTRAggregator::GetCurrentWeekNumber() {
+  return week_number_;
+}
+
 bool CTRAggregator::HasPreviousWeekData() {
   return storage_.HasData(week_number_ - 1);
 }
 
 int CTRAggregator::GetPreviousWeekImpressions() {
   return storage_.ReadImpressions(week_number_ - 1);
 }
 
 float CTRAggregator::GetPreviousWeekCTR() {
   if (!HasPreviousWeekData())
@@ skipping 48 matching lines @@
 }
 
 // Testing only
 
 void CTRAggregator::IncrementWeek(int weeks) {
   week_number_ += weeks;
   storage_.AdvanceToWeek(week_number_);
 }
 
 }  // namespace contextual_search