[NTPSnippets] Switch from TickClock to Clock for storing the last background fetched time.

components/ntp_snippets/remote/remote_suggestions_provider.cc

 // 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 "components/ntp_snippets/remote/remote_suggestions_provider.h"
 
 #include <algorithm>
 #include <iterator>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/task_runner_util.h"
+#include "base/time/default_clock.h"
 #include "base/time/default_tick_clock.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "components/data_use_measurement/core/data_use_user_data.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/image_fetcher/image_decoder.h"
 #include "components/image_fetcher/image_fetcher.h"
 #include "components/ntp_snippets/features.h"
 #include "components/ntp_snippets/pref_names.h"
 #include "components/ntp_snippets/remote/remote_suggestions_database.h"
@@ skipping 212 matching lines @@
       snippets_fetcher_(std::move(snippets_fetcher)),
       image_fetcher_(std::move(image_fetcher)),
       image_decoder_(std::move(image_decoder)),
       database_(std::move(database)),
       status_service_(std::move(status_service)),
       fetch_when_ready_(false),
       nuke_when_initialized_(false),
       thumbnail_requests_throttler_(
           pref_service,
           RequestThrottler::RequestType::CONTENT_SUGGESTION_THUMBNAIL),
-      tick_clock_(base::MakeUnique<base::DefaultTickClock>()) {
+      clock_(base::MakeUnique<base::DefaultClock>()) {
   pref_service_->ClearPref(kDeprecatedSnippetHostsPref);
 
   RestoreCategoriesFromPrefs();
   // The articles category always exists. Add it if we didn't get it from prefs.
   // TODO(treib): Rethink this.
   category_contents_.insert(
       std::make_pair(articles_category_,
                      CategoryContent(BuildArticleCategoryInfo(base::nullopt))));
   // Tell the observer about all the categories.
   for (const auto& entry : category_contents_) {
@@ skipping 447 matching lines @@
   if (!ready()) {
     // TODO(tschumann): What happens if this was a user-triggered, interactive
     // request? Is the UI waiting indefinitely now?
     return;
   }
 
   // Record the fetch time of a successfull background fetch.
   if (!interactive_request &&
       fetch_result == NTPSnippetsFetcher::FetchResult::SUCCESS) {
     pref_service_->SetInt64(prefs::kLastSuccessfulBackgroundFetchTime,
-                            tick_clock_->NowTicks().ToInternalValue());
+                            clock_->Now().ToInternalValue());
   }
 
   // Mark all categories as not provided by the server in the latest fetch. The
   // ones we got will be marked again below.
   for (auto& item : category_contents_) {
     CategoryContent* content = &item.second;
     content->included_in_last_server_response = false;
   }
 
   // Clear up expired dismissed snippets before we use them to filter new ones.
@@ skipping 612 matching lines @@
 RemoteSuggestionsProvider::CategoryContent::CategoryContent(CategoryContent&&) =
     default;
 
 RemoteSuggestionsProvider::CategoryContent::~CategoryContent() = default;
 
 RemoteSuggestionsProvider::CategoryContent&
 RemoteSuggestionsProvider::CategoryContent::operator=(CategoryContent&&) =
     default;
 
 }  // namespace ntp_snippets