Oilpan: Fix crash in content::WebIDBCursorImpl::~WebIDBCursorImpl.

Source/modules/indexeddb/IDBAny.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 57 matching lines @@
     }
     static PassRefPtr<IDBAny> create(int64_t value)
     {
         return adoptRef(new IDBAny(value));
     }
     static PassRefPtr<IDBAny> create(PassRefPtr<SharedBuffer> value, PassRefPtr<IDBKey> key, const IDBKeyPath& keyPath)
     {
         return adoptRef(new IDBAny(value, key, keyPath));
     }
     ~IDBAny();
+    void contextWillBeDestroyed();
 
     enum Type {
         UndefinedType = 0,
         NullType,
         DOMStringListType,
         IDBCursorType,
         IDBCursorWithValueType,
         IDBDatabaseType,
         IDBIndexType,
         IDBObjectStoreType,
@@ skipping 48 matching lines @@
     const RefPtr<IDBKey> m_idbKey;
     const IDBKeyPath m_idbKeyPath;
     const RefPtr<SharedBuffer> m_buffer;
     const String m_string;
     const int64_t m_integer;
 };
 
 } // namespace WebCore
 
 #endif // IDBAny_h