IndexedDB: Various C++11isms and cleanup

Source/modules/indexeddb/IDBTransaction.h

 /*
  * 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 101 matching lines @@
 
     void enqueueEvent(PassRefPtrWillBeRawPtr<Event>);
 
     enum State {
         Inactive, // Created or started, but not in an event callback
         Active, // Created or started, in creation scope or an event callback
         Finishing, // In the process of aborting or completing.
         Finished, // No more events will fire and no new requests may be filed.
     };
 
-    int64_t m_id;
+    const int64_t m_id;
     Member<IDBDatabase> m_database;
     const HashSet<String> m_objectStoreNames;
     Member<IDBOpenDBRequest> m_openDBRequest;
     const WebIDBTransactionMode m_mode;
-    State m_state;
-    bool m_hasPendingActivity;
-    bool m_contextStopped;
+    State m_state = Active;
+    bool m_hasPendingActivity = true;
+    bool m_contextStopped = false;
     Member<DOMError> m_error;
 
     HeapListHashSet<Member<IDBRequest>> m_requestList;
 
     typedef HeapHashMap<String, Member<IDBObjectStore>> IDBObjectStoreMap;
     IDBObjectStoreMap m_objectStoreMap;
 
-    typedef HeapHashSet<Member<IDBObjectStore>> IDBObjectStoreSet;
-    IDBObjectStoreSet m_deletedObjectStores;
-
-    typedef HeapHashMap<Member<IDBObjectStore>, IDBObjectStoreMetadata> IDBObjectStoreMetadataMap;
-    IDBObjectStoreMetadataMap m_objectStoreCleanupMap;
+    HeapHashSet<Member<IDBObjectStore>> m_deletedObjectStores;
+    HeapHashMap<Member<IDBObjectStore>, IDBObjectStoreMetadata> m_objectStoreCleanupMap;
     IDBDatabaseMetadata m_previousMetadata;
 };
 
 } // namespace blink
 
 #endif // IDBTransaction_h