indexeddb: make setVersion fire blocked event if other connections are open

chrome/renderer/indexed_db_dispatcher.cc

Index: chrome/renderer/indexed_db_dispatcher.cc
diff --git a/chrome/renderer/indexed_db_dispatcher.cc b/chrome/renderer/indexed_db_dispatcher.cc
index 8863b9acb78b566f8ff2919b4be17637e4304384..f612dc7475517aed43ab302662756863ac8adf6e 100644
--- a/chrome/renderer/indexed_db_dispatcher.cc
+++ b/chrome/renderer/indexed_db_dispatcher.cc
@@ -52,6 +52,7 @@ bool IndexedDBDispatcher::OnMessageReceived(const IPC::Message& msg) {
     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksSuccessSerializedScriptValue,
                         OnSuccessSerializedScriptValue)
     IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksError, OnError)
+    IPC_MESSAGE_HANDLER(IndexedDBMsg_CallbacksBlocked, OnBlocked)
     IPC_MESSAGE_HANDLER(IndexedDBMsg_TransactionCallbacksAbort, OnAbort)
     IPC_MESSAGE_HANDLER(IndexedDBMsg_TransactionCallbacksComplete, OnComplete)
     IPC_MESSAGE_HANDLER(IndexedDBMsg_TransactionCallbacksTimeout, OnTimeout)
@@ -377,6 +378,11 @@ void IndexedDBDispatcher::OnSuccessOpenCursor(int32 repsonse_id,
   pending_callbacks_.Remove(repsonse_id);
 }
 
+void IndexedDBDispatcher::OnBlocked(int32 response_id) {
+  WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(response_id);
+  callbacks->onBlocked();
+}
+
 void IndexedDBDispatcher::OnError(int32 response_id, int code,
                                   const string16& message) {
   WebIDBCallbacks* callbacks = pending_callbacks_.Lookup(response_id);