Histogram versions and extended error codes for SQLite databases.

components/webdata/common/web_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/webdata/common/web_database.h"
 
 #include <algorithm>
 
 #include "base/stl_util.h"
 #include "content/public/browser/notification_service.h"
@@ skipping 57 matching lines @@
 sql::Connection* WebDatabase::GetSQLConnection() {
   return &db_;
 }
 
 sql::InitStatus WebDatabase::Init(const base::FilePath& db_name) {
   // When running in unit tests, there is already a NotificationService object.
   // Since only one can exist at a time per thread, check first.
   if (!content::NotificationService::current())
     notification_service_.reset(content::NotificationService::Create());
 
-  db_.set_error_histogram_name("Sqlite.Web.Error");
+  db_.set_histogram_tag("Web");
 
   // We don't store that much data in the tables so use a small page size.
   // This provides a large benefit for empty tables (which is very likely with
   // the tables we create).
   db_.set_page_size(2048);
 
   // We shouldn't have much data and what access we currently have is quite
   // infrequent. So we go with a small cache size.
   db_.set_cache_size(32);
 
@@ skipping 75 matching lines @@
       if (!it->second->MigrateToVersion(next_version,
                                         &update_compatible_version)) {
         return FailedMigrationTo(next_version);
       }
 
       ChangeVersion(&meta_table_, next_version, update_compatible_version);
     }
   }
   return sql::INIT_OK;
 }