Add canBeDynamicallyUpdated() in BinaryDictionaryInfo.

        return &mDictionaryHeader;

    }

    AK_FORCE_INLINE bool isDynamicallyUpdatable() const {

        // TODO: Support dynamic dictionary formats.

        const bool isUpdatableDictionaryFormat = false;

        return mIsUpdatable && isUpdatableDictionaryFormat;

    }

 private:

    DISALLOW_COPY_AND_ASSIGN(BinaryDictionaryInfo);