@bacon_cabbage so you now have the flash plugin working in iceweasel/mozilla that's fine, you can use the same plugin for chrome with a symlink, depending which version you are using.
#ln -s /usr/lib/mozilla/plugins/libflashplayer.so /path_to_chrome_plugin_dir/libflashplayer.so
or you can try the non-google chromium which I use, a guide and download link at
The instructions are specific to that particular chromium version
The 64 bit version is not tested but its worth a look. A command you can use if you want ALL the mozilla plugins including java etc is
#ln -s /usr/lib/mozilla/plugins/* . /usr/lib/chrome_plugins_dir/