Port HistoryService::ScheduleDBTask to CancelableTaskTracker

chrome/browser/history/url_index_private_data.cc

Index: chrome/browser/history/url_index_private_data.cc
diff --git a/chrome/browser/history/url_index_private_data.cc b/chrome/browser/history/url_index_private_data.cc
index 33b702633f7bf14da5d8bb02d9ba267878bfe54a..bf062cfeef6cc90cb11cc85f3549573b9472a2e0 100644
--- a/chrome/browser/history/url_index_private_data.cc
+++ b/chrome/browser/history/url_index_private_data.cc
@@ -280,7 +280,8 @@ bool URLIndexPrivateData::UpdateURL(
     HistoryService* history_service,
     const URLRow& row,
     const std::string& languages,
-    const std::set<std::string>& scheme_whitelist) {
+    const std::set<std::string>& scheme_whitelist,
+    base::CancelableTaskTracker* tracker) {
   // The row may or may not already be in our index. If it is not already
   // indexed and it qualifies then it gets indexed. If it is already
   // indexed and still qualifies then it gets updated, otherwise it
@@ -293,7 +294,12 @@ bool URLIndexPrivateData::UpdateURL(
     URLRow new_row(row);
     new_row.set_id(row_id);
     row_was_updated = RowQualifiesAsSignificant(new_row, base::Time()) &&
-        IndexRow(NULL, history_service, new_row, languages, scheme_whitelist);
+                      IndexRow(NULL,
+                               history_service,
+                               new_row,
+                               languages,
+                               scheme_whitelist,
+                               tracker);
   } else if (RowQualifiesAsSignificant(row, base::Time())) {
     // This indexed row still qualifies and will be re-indexed.
     // The url won't have changed but the title, visit count, etc.
@@ -308,7 +314,7 @@ bool URLIndexPrivateData::UpdateURL(
       row_to_update.set_last_visit(row.last_visit());
       // If something appears to have changed, update the recent visits
       // information.
-      ScheduleUpdateRecentVisits(history_service, row_id);
+      ScheduleUpdateRecentVisits(history_service, row_id, tracker);
       // While the URL is guaranteed to remain stable, the title may have
       // changed. If so, then update the index with the changed words.
       if (title_updated) {
@@ -357,10 +363,10 @@ void URLIndexPrivateData::UpdateRecentVisits(
 
 void URLIndexPrivateData::ScheduleUpdateRecentVisits(
     HistoryService* history_service,
-    URLID url_id) {
+    URLID url_id,
+    base::CancelableTaskTracker* tracker) {
   history_service->ScheduleDBTask(
-      new UpdateRecentVisitsFromHistoryDBTask(this, url_id),
-      &recent_visits_consumer_);
+      new UpdateRecentVisitsFromHistoryDBTask(this, url_id), tracker);
 }
 
 // Helper functor for DeleteURL.
@@ -444,8 +450,8 @@ scoped_refptr<URLIndexPrivateData> URLIndexPrivateData::RebuildFromHistory(
     return NULL;
   rebuilt_data->last_time_rebuilt_from_history_ = base::Time::Now();
   for (URLRow row; history_enum.GetNextURL(&row); ) {
-    rebuilt_data->IndexRow(history_db, NULL, row, languages,
-                           scheme_whitelist);
+    rebuilt_data->IndexRow(
+        history_db, NULL, row, languages, scheme_whitelist, NULL);
   }
 
   UMA_HISTOGRAM_TIMES("History.InMemoryURLIndexingTime",
@@ -468,10 +474,6 @@ bool URLIndexPrivateData::WritePrivateDataToCacheFileTask(
   return private_data->SaveToFile(file_path);
 }
 
-void URLIndexPrivateData::CancelPendingUpdates() {
-  recent_visits_consumer_.CancelAllRequests();
-}
-
 scoped_refptr<URLIndexPrivateData> URLIndexPrivateData::Duplicate() const {
   scoped_refptr<URLIndexPrivateData> data_copy = new URLIndexPrivateData;
   data_copy->last_time_rebuilt_from_history_ = last_time_rebuilt_from_history_;
@@ -685,7 +687,8 @@ bool URLIndexPrivateData::IndexRow(
     HistoryService* history_service,
     const URLRow& row,
     const std::string& languages,
-    const std::set<std::string>& scheme_whitelist) {
+    const std::set<std::string>& scheme_whitelist,
+    base::CancelableTaskTracker* tracker) {
   const GURL& gurl(row.url());
 
   // Index only URLs with a whitelisted scheme.
@@ -730,8 +733,9 @@ bool URLIndexPrivateData::IndexRow(
                                               &recent_visits))
       UpdateRecentVisits(row_id, recent_visits);
   } else {
+    DCHECK(tracker);
     DCHECK(history_service);
-    ScheduleUpdateRecentVisits(history_service, row_id);
+    ScheduleUpdateRecentVisits(history_service, row_id, tracker);
   }
 
   return true;