>
> I updated the example again.  Try this:
>
> --8<---------------cut here---------------start------------->8---
> #+LATEX_HEADER: \usepackage{tikz}
>
> * Tikz test
> #+name: contents
> #+header: :exports (if (and (boundp 'backend) (eq (org-export-backend-name backend) (intern "latex"))) "results" "none")
> #+header: :results latex
> #+begin_src latex
>   \begin{tikzpicture}
>     \node[red!50!black] (a) {A};
>     \node (b) [right of=a] {B};
>     \draw[->] (a) -- (b);
>   \end{tikzpicture}
> #+end_src
>
> #+header: :exports (if (and (boundp 'backend) (eq (org-export-backend-name backend) (intern "latex"))) "none" "results")
> #+header: :results raw :file test.png
> #+header: :imagemagick yes :iminoptions -density 600 :imoutoptions -geometry 400
> #+header: :fit yes :noweb yes :headers '("\\usepackage{tikz}")
> #+begin_src latex
>   <<contents>>
> #+end_src
> --8<---------------cut here---------------end--------------->8---
>

Building from this example, the attached patch to ob-latex.el combined
with the attached org-mode file should export the latex (tikz) code as
an inline SVG image to HTML and as embedded tikz to latex.

If this works generally I can commit the patch to ob-latex.el.