[ 12:48:35 rene ] chromiumwww Mostly BSD-licensed web browser based on WebKit and Gtk+
Convert to USES=compiler:c++11-lang and remove the now-obsolete GCC option.
This also means that on systems where /usr/bin/cc is clang 3.3 or higher,
there is no option to compile this port with GCC (since it is new enough
for C++11). On older systems FAVORITE_COMPILER=gcc can be set.
While here use a few more option helpers.