Remove idb transaction callbacks onTimeout stuff that was removed from the spec.

content/browser/in_process_webkit/indexed_db_transaction_callbacks.cc

Index: content/browser/in_process_webkit/indexed_db_transaction_callbacks.cc
diff --git a/content/browser/in_process_webkit/indexed_db_transaction_callbacks.cc b/content/browser/in_process_webkit/indexed_db_transaction_callbacks.cc
index c8062421f93c7778fe1bd5e0bc35fefe1360fe34..2aea12bb89f959a8c68ce0d91c6b2645765a1561 100644
--- a/content/browser/in_process_webkit/indexed_db_transaction_callbacks.cc
+++ b/content/browser/in_process_webkit/indexed_db_transaction_callbacks.cc
@@ -26,8 +26,3 @@ void IndexedDBTransactionCallbacks::onComplete() {
   dispatcher_host_->Send(
       new IndexedDBMsg_TransactionCallbacksComplete(transaction_id_));
 }
-
-void IndexedDBTransactionCallbacks::onTimeout() {
-  dispatcher_host_->Send(
-      new IndexedDBMsg_TransactionCallbacksTimeout(transaction_id_));
-}