Support renaming of IndexedDB indexes and object stores.

third_party/WebKit/Source/modules/indexeddb/IDBTransaction.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 173 matching lines @@
     IDBObjectStoreMap::iterator it = m_objectStoreMap.find(name);
     if (it != m_objectStoreMap.end()) {
         IDBObjectStore* objectStore = it->value;
         m_objectStoreMap.remove(name);
         objectStore->markDeleted();
         m_objectStoreCleanupMap.set(objectStore, objectStore->metadata());
         m_deletedObjectStores.add(objectStore);
     }
 }
 
+void IDBTransaction::objectStoreWillBeRenamed(const String& oldName, const String& newName)
+{
+    DCHECK(m_state != Finished);
+    DCHECK(isVersionChange());
+
+    DCHECK(!m_objectStoreMap.contains(newName));
+    DCHECK(m_objectStoreMap.contains(oldName)) << "The object store had to be accessed in order to be renamed.";
+
+    IDBObjectStoreMap::iterator it = m_objectStoreMap.find(oldName);
+    m_objectStoreMap.set(newName, it->value);
+    m_objectStoreMap.remove(oldName);
+}
+
 void IDBTransaction::setActive(bool active)
 {
     DCHECK_NE(m_state, Finished) << "A finished transaction tried to setActive(" << (active ? "true" : "false") << ")";
     if (m_state == Finishing)
         return;
     ASSERT(active != (m_state == Active));
     m_state = active ? Active : Inactive;
 
     if (!active && m_requestList.isEmpty() && backendDB())
         backendDB()->commit(m_id);
@@ skipping 219 matching lines @@
     event->setTarget(this);
     eventQueue->enqueueEvent(event);
 }
 
 WebIDBDatabase* IDBTransaction::backendDB() const
 {
     return m_database->backend();
 }
 
 } // namespace blink