Add a TODO comment to describe when we can remove the const_cast for the NSS function SGN_Update.
Add a TODO comment to describe when we can remove the const_cast for
the NSS function SGN_Update.

R=rafaelw
BUG=20669
TEST=none
Review URL: http://codereview.chromium.org/218035

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@27163 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser