[Refactor] Simplify HistoryBackend::UpdateFaviconMappingsAndFetchImpl() signature

components/history/core/browser/thumbnail_database.cc

 // Copyright (c) 2012 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/history/core/browser/thumbnail_database.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <algorithm>
 #include <string>
@@ skipping 566 matching lines @@
   sql::Statement statement(db_.GetCachedStatement(SQL_FROM_HERE,
       "UPDATE favicon_bitmaps SET last_updated=? WHERE icon_id=?"));
   statement.BindInt64(0, 0);
   statement.BindInt64(1, icon_id);
 
   return statement.Run();
 }
 
 favicon_base::FaviconID ThumbnailDatabase::GetFaviconIDForFaviconURL(
     const GURL& icon_url,
-    int required_icon_type,
-    favicon_base::IconType* icon_type) {
-  sql::Statement statement(db_.GetCachedStatement(SQL_FROM_HERE,
-      "SELECT id, icon_type FROM favicons WHERE url=? AND (icon_type & ? > 0) "
-      "ORDER BY icon_type DESC"));
+    favicon_base::IconType icon_type) {
+  sql::Statement statement(db_.GetCachedStatement(
+      SQL_FROM_HERE, "SELECT id FROM favicons WHERE url=? AND icon_type=?"));
   statement.BindString(0, URLDatabase::GURLToDatabaseURL(icon_url));
-  statement.BindInt(1, required_icon_type);
+  statement.BindInt(1, icon_type);
 
   if (!statement.Step())
     return 0;  // not cached
 
-  if (icon_type)
-    *icon_type = static_cast<favicon_base::IconType>(statement.ColumnInt(1));
   return statement.ColumnInt64(0);
 }
 
 bool ThumbnailDatabase::GetFaviconHeader(favicon_base::FaviconID icon_id,
                                          GURL* icon_url,
                                          favicon_base::IconType* icon_type) {
   DCHECK(icon_id);
 
   sql::Statement statement(db_.GetCachedStatement(SQL_FROM_HERE,
       "SELECT url, icon_type FROM favicons WHERE id=?"));
@@ skipping 457 matching lines @@
   meta_table_.SetVersionNumber(8);
   meta_table_.SetCompatibleVersionNumber(std::min(8, kCompatibleVersionNumber));
   return true;
 }
 
 bool ThumbnailDatabase::IsFaviconDBStructureIncorrect() {
   return !db_.IsSQLValid("SELECT id, url, icon_type FROM favicons");
 }
 
 }  // namespace history