Cannot change natbib bibliography font size [memoir class]

Question

I am using the ucbthesis class (which is based off the memoir class) with natbib and cannot find any way to change the size of the font in my references (in the bib, not the textual citations). It is too small and I need it to be the same size as the the main text. I have already tried adding \renewcommand{\bibfont}{\normalsize} to my preamble, but that throws an error saying \bibfont is undefined. I have also tried \let\bibfont\normalsize, which has no effect.

Here a MWE:

\documentclass[oldfontcommands]{ucbthesis}
\usepackage{natbib}

\begin{document}
\chapter{Prexy Salaam}
\section{Faceplate Marginalia}
Invasive brag \cite{waveshaping}.
\HUGE{Why can't I change the font size of the references?}

\bibliographystyle{natbib}
\HUGE{\bibliography{references}}

\end{document}

And references.bib is:

@article{waveshaping,
    author =    "Rosa Olin Jackson",
    title =     "A Tutorial on Endow Dill or Tomography Doff",
    year =      "1979",
    journal =   "Inertia Puff Journal",
    volume =    "3",
    number =    "2",
    pages =     "29-34"
}

The ucbthesis class is available here.

Answer 1

Within my natbib.sty file I had the following block:

\renewenvironment{thebibliography}[1]{%
 \bibsection
 \vspace{1\p@}\parindent \z@\bibpreamble\bibfont\list
   {\@biblabel{\arabic{NAT@ctr}}}{\@bibsetup{#1}%
    \setcounter{NAT@ctr}{0}}%
    \ifNAT@openbib
      \renewcommand\newblock{\par}
    \else
      \renewcommand\newblock{\hskip .11em \@plus.33em \@minus.07em}%
    \fi
    \sloppy\clubpenalty4000\widowpenalty4000
    \sfcode`\.=1000\relax
    \let\citeN\cite \let\shortcite\cite
    \let\citeasnoun\cite\fontsize{7}{9}\selectfont
 }{\def\@noitemerr{%
  \PackageWarning{natbib}
     {Empty `thebibliography' environment}}%
  \endlist\vskip-\lastskip}

I changed the \fontsize{7}{9} to \fontsize{12}{14}.