RFR: JDK-8188578: move printFramesDocument from HtmlDocWriter to FrameOutputWriter

[Kumar Srinivasan]

Hi Jon,

I would check for unused imports in HtmlDocWriter.java
and remove those, otherwise looks good.

Kumar

> Please review a very simple cleanup fix to move an out-of-place method
> from HtmlDocWriter to nearer its callsites in FrameOutputWriter.
>
> Cleanup: no new tests required.
>
> JBS: https://bugs.openjdk.java.net/browse/JDK-8188578
> Webrev: http://cr.openjdk.java.net/~jjg/8188578/webrev.00/index.html
>
> -- Jon