WIP Durable storage, webkit side

Source/modules/quota/StorageQuota.h

 /*
  * Copyright (C) 2014 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 31 matching lines @@
     DEFINE_WRAPPERTYPEINFO();
 public:
     static StorageQuota* create()
     {
         return new StorageQuota();
     }
 
     Vector<String> supportedTypes() const;
 
     ScriptPromise queryInfo(ScriptState*, String type);
+    ScriptPromise requestDurability(ScriptState*);
     ScriptPromise requestPersistentQuota(ScriptState*, unsigned long long newQuota);
 
     DEFINE_INLINE_TRACE() { }
 
 private:
     StorageQuota();
 };
 
 } // namespace blink
 
 #endif // StorageQuota_h