Add field to monitor last visited time for each search engine

components/search_engines/template_url_service.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_
 #define COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 395 matching lines @@
 
  private:
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceTest, TestManagedDefaultSearch);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceTest,
                            UpdateKeywordSearchTermsForURL);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceTest,
                            DontUpdateKeywordSearchForNonReplaceable);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceTest, ChangeGoogleBaseValue);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceTest, MergeDeletesUnusedProviders);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceTest, AddExtensionKeyword);
+  FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceTest, LastVisitedTimeUpdate);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceSyncTest, UniquifyKeyword);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceSyncTest,
                            IsLocalTemplateURLBetter);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceSyncTest,
                            ResolveSyncKeywordConflict);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceSyncTest, PreSyncDeletes);
   FRIEND_TEST_ALL_PREFIXES(TemplateURLServiceSyncTest, MergeInSyncTemplateURL);
   FRIEND_TEST_ALL_PREFIXES(ToolbarModelTest, GoogleBaseURL);
 
   friend class InstantUnitTestBase;
@@ skipping 114 matching lines @@
   // Updates the information in |existing_turl| using the information from
   // |new_values|, but the ID for |existing_turl| is retained.  Notifying
   // observers is the responsibility of the caller.  Returns whether
   // |existing_turl| was found in |template_urls_| and thus could be updated.
   //
   // NOTE: This should not be called with an extension keyword as there are no
   // updates needed in that case.
   bool UpdateNoNotify(TemplateURL* existing_turl,
                       const TemplateURL& new_values);
 
+  // Calls UpdateNoNotify() and NotifyObservers() if update succeeds.
+  // Returns the result of UpdateNoNotify().
+  bool Update(TemplateURL* existing_turl, const TemplateURL& new_values);
+
   // If the TemplateURL comes from a prepopulated URL available in the current
   // country, update all its fields save for the keyword, short name and id so
   // that they match the internal prepopulated URL. TemplateURLs not coming from
   // a prepopulated URL are not modified.
   static void UpdateTemplateURLIfPrepopulated(TemplateURL* existing_turl,
                                               PrefService* prefs);
 
   // If the TemplateURL's sync GUID matches the kSyncedDefaultSearchProviderGUID
   // preference it will be used to update the DSE in memory and as persisted in
   // preferences.
   void MaybeUpdateDSEAfterSync(TemplateURL* synced_turl);
 
   // Iterates through the TemplateURLs to see if one matches the visited url.
   // For each TemplateURL whose url matches the visited url
   // SetKeywordSearchTermsForURL is invoked.
   void UpdateKeywordSearchTermsForURL(const URLVisitedDetails& details);
 
+  // Updates the last_visited time of TemplateURL to the current time.

[Peter Kasting, 2016/12/02 21:31:13]

Nit: TemplateURL -> |url|

+  void UpdateTemplateURLVisitTime(TemplateURL* url);
+
   // If necessary, generates a visit for the site http:// + t_url.keyword().
   void AddTabToSearchVisit(const TemplateURL& t_url);
 
   // Requests the Google URL tracker to check the server if necessary.
   void RequestGoogleURLTrackerServerCheckIfNecessary();
 
   // Invoked when the Google base URL has changed. Updates the mapping for all
   // TemplateURLs that have a replacement term of {google:baseURL} or
   // {google:baseSuggestURL}.
   void GoogleBaseURLChanged();
@@ skipping 247 matching lines @@
   // Helper class to manage the default search engine.
   DefaultSearchManager default_search_manager_;
 
   std::unique_ptr<GoogleURLTracker::Subscription>
       google_url_updated_subscription_;
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURLService);
 };
 
 #endif  // COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_