Remove TextDatabase from the history service.

chrome/browser/history/history_database.cc

Index: chrome/browser/history/history_database.cc
diff --git a/chrome/browser/history/history_database.cc b/chrome/browser/history/history_database.cc
index 9be2f15bf4daca7aef5bcc68d5b569237dc23258..322f65b2b79e6f31cdf69640b2f5c5ad7c871f68 100644
--- a/chrome/browser/history/history_database.cc
+++ b/chrome/browser/history/history_database.cc
@@ -429,15 +429,13 @@ sql::InitStatus HistoryDatabase::EnsureCurrentVersion() {
 #if !defined(OS_WIN)
 void HistoryDatabase::MigrateTimeEpoch() {
   // Update all the times in the URLs and visits table in the main database.
-  // For visits, clear the indexed flag since we'll delete the FTS databases in
-  // the next step.
   ignore_result(db_.Execute(
       "UPDATE urls "
       "SET last_visit_time = last_visit_time + 11644473600000000 "
       "WHERE id IN (SELECT id FROM urls WHERE last_visit_time > 0);"));
   ignore_result(db_.Execute(
       "UPDATE visits "
-      "SET visit_time = visit_time + 11644473600000000, is_indexed = 0 "
+      "SET visit_time = visit_time + 11644473600000000 "
       "WHERE id IN (SELECT id FROM visits WHERE visit_time > 0);"));
   ignore_result(db_.Execute(
       "UPDATE segment_usage "