[sql] WARN_UNUSED_RESULT on Execute().

chrome/browser/history/text_database.cc

Index: chrome/browser/history/text_database.cc
diff --git a/chrome/browser/history/text_database.cc b/chrome/browser/history/text_database.cc
index c5da03cf2cad466c5d51728e5e88c3bbccde0c75..310f52b2af76374c86a102233bba19143f66c9c0 100644
--- a/chrome/browser/history/text_database.cc
+++ b/chrome/browser/history/text_database.cc
@@ -201,10 +201,8 @@ bool TextDatabase::CreateTables() {
       return false;
   }
 
-  // Create the index. This will fail when the index already exists, so we just
-  // ignore the error.
-  db_.Execute("CREATE INDEX info_time ON info(time)");
-  return true;
+  // Create the index.
+  return db_.Execute("CREATE INDEX IF NOT EXISTS info_time ON info(time)");
 }
 
 bool TextDatabase::AddPageData(base::Time time,