IndexedDB: Simplify data loss code/message routing

content/browser/indexed_db/indexed_db_factory.cc

 // Copyright (c) 2013 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 "content/browser/indexed_db/indexed_db_factory.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "content/browser/indexed_db/indexed_db_backing_store.h"
@@ skipping 298 matching lines @@
       callbacks->OnError(IndexedDBDatabaseError(
           blink::WebIDBDatabaseExceptionUnknownError,
           ASCIIToUTF16(
               "Internal error creating database backend for indexedDB.open.")));
       return;
     }
   } else {
     database = it->second;
   }
 
-  database->OpenConnection(callbacks,
-                           database_callbacks,
-                           transaction_id,
-                           version,
-                           data_loss,
-                           data_loss_message);
+  if (data_loss != blink::WebIDBDataLossNone)
+    callbacks->OnDataLoss(data_loss, data_loss_message);
+
+  database->OpenConnection(
+      callbacks, database_callbacks, transaction_id, version);
 
   if (!was_open && database->ConnectionCount() > 0)
     database_map_[unique_identifier] = database;
 }
 
 std::vector<IndexedDBDatabase*> IndexedDBFactory::GetOpenDatabasesForOrigin(
     const GURL& origin_url) const {
   std::vector<IndexedDBDatabase*> result;
   for (IndexedDBDatabaseMap::const_iterator it = database_map_.begin();
        it != database_map_.end();
        ++it) {
     if (it->first.first == origin_url)
       result.push_back(it->second);
   }
   return result;
 }
 
 }  // namespace content