Revert 183330 - Speculation was wrong. Relanding original.

Revert 183330 - Speculation was wrong. Relanding original.
> Revert 182723 - Speculative. Will reland if no perf change.
> 
> > Update nss_revision to r182578 to pick up WIN64 build
> > system tweaks and a fix for invalid read in rc4_wordconv.
> > 
> > The underlying CLs are:
> > https://codereview.chromium.org/12210134/
> > https://codereview.chromium.org/12226071/
> > 
> > R=rsleevi@chromium.org
> > BUG=167951, 174140
> > TEST=none 
> > 
> > Review URL: https://chromiumcodereview.appspot.com/12259038
> 
> TBR=wtc@chromium.org
> 
> Review URL: https://chromiumcodereview.appspot.com/12303041

TBR=wtc@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=183354

[James Simonsen, 2013-02-20 01:17:45]

Committed patchset #1 manually as r183354.