Add support for time based deletion of browsing data on iOS

ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm

 // Copyright 2015 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 "ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.h"
 
 #include <map>
 #include <set>
 #include <string>
 
@@ skipping 72 matching lines @@
 IOSChromeBrowsingDataRemover::NotificationDetails::NotificationDetails(
     base::Time removal_begin,
     int removal_mask)
     : removal_begin(removal_begin), removal_mask(removal_mask) {}
 
 IOSChromeBrowsingDataRemover::NotificationDetails::~NotificationDetails() {}
 
 // Static.
 IOSChromeBrowsingDataRemover* IOSChromeBrowsingDataRemover::CreateForPeriod(
     ios::ChromeBrowserState* browser_state,
-    TimePeriod period) {
+    browsing_data::TimePeriod period) {
   switch (period) {
-    case EVERYTHING:
+    case browsing_data::LAST_HOUR:
+      base::RecordAction(UserMetricsAction("ClearBrowsingData_LastHour"));
+      break;
+    case browsing_data::LAST_DAY:
+      base::RecordAction(UserMetricsAction("ClearBrowsingData_LastDay"));
+      break;
+    case browsing_data::LAST_WEEK:
+      base::RecordAction(UserMetricsAction("ClearBrowsingData_LastWeek"));
+      break;
+    case browsing_data::FOUR_WEEKS:
+      base::RecordAction(UserMetricsAction("ClearBrowsingData_LastMonth"));
+      break;
+    case browsing_data::ALL_TIME:
       base::RecordAction(UserMetricsAction("ClearBrowsingData_Everything"));
       break;
   }
   return new IOSChromeBrowsingDataRemover(
-      browser_state,
-      IOSChromeBrowsingDataRemover::CalculateBeginDeleteTime(period),
+      browser_state, browsing_data::CalculateBeginDeleteTime(period),
       base::Time::Max());
 }
 
 IOSChromeBrowsingDataRemover::IOSChromeBrowsingDataRemover(
     ios::ChromeBrowserState* browser_state,
     base::Time delete_begin,
     base::Time delete_end)
     : browser_state_(browser_state),
       delete_begin_(delete_begin),
       delete_end_(delete_end),
@@ skipping 184 matching lines @@
               browser_state_);
       if (data_manager)
         data_manager->Refresh();
     }
   }
 
   if (remove_mask & REMOVE_CACHE) {
     base::RecordAction(UserMetricsAction("ClearBrowsingData_Cache"));
 
     waiting_for_clear_cache_ = true;
-    DCHECK(delete_begin_.is_null()) << "Partial clearing not supported";
     ClearHttpCache(browser_state_->GetRequestContext(),
                    WebThread::GetTaskRunnerForThread(WebThread::IO),
+                   delete_begin_, delete_end_,
                    base::Bind(&IOSChromeBrowsingDataRemover::OnClearedCache,
                               base::Unretained(this)));
   }
 
   // Remove omnibox zero-suggest cache results.
   if ((remove_mask & (REMOVE_CACHE | REMOVE_COOKIES))) {
     browser_state_->GetPrefs()->SetString(omnibox::kZeroSuggestCachedResults,
                                           std::string());
   }
 
@@ skipping 24 matching lines @@
 
 void IOSChromeBrowsingDataRemover::RemoveObserver(Observer* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
 void IOSChromeBrowsingDataRemover::OnHistoryDeletionDone() {
   waiting_for_clear_history_ = false;
   NotifyAndDeleteIfDone();
 }
 
-base::Time IOSChromeBrowsingDataRemover::CalculateBeginDeleteTime(
-    TimePeriod time_period) {
-  base::TimeDelta diff;
-  base::Time delete_begin_time = base::Time::Now();
-  switch (time_period) {
-    case EVERYTHING:
-      delete_begin_time = base::Time();
-      break;
-    default:
-      NOTREACHED() << L"Missing item";
-      break;
-  }
-  return delete_begin_time - diff;
-}
-
 bool IOSChromeBrowsingDataRemover::AllDone() {
   return !waiting_for_clear_autofill_origin_urls_ &&
          !waiting_for_clear_cache_ && !waiting_for_clear_channel_ids_ &&
          !waiting_for_clear_cookies_count_ && !waiting_for_clear_form_ &&
          !waiting_for_clear_history_ &&
          !waiting_for_clear_hostname_resolution_cache_ &&
          !waiting_for_clear_keyword_data_ &&
          !waiting_for_clear_networking_history_ &&
          !waiting_for_clear_passwords_;
 }
@@ skipping 129 matching lines @@
   waiting_for_clear_autofill_origin_urls_ = false;
   NotifyAndDeleteIfDone();
 }
 
 // static
 IOSChromeBrowsingDataRemover::CallbackSubscription
 IOSChromeBrowsingDataRemover::RegisterOnBrowsingDataRemovedCallback(
     const IOSChromeBrowsingDataRemover::Callback& callback) {
   return GetOnBrowsingDataRemovedCallbacks()->Add(callback);
 }