Move |requires_authorization| flag and |update_url| for plug-ins out of webkit::npapi::PluginGroup.

It's now in PluginInstaller.

BUG=none
TEST=nope

Review URL: http://codereview.chromium.org/9536013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@128949 0039d316-1c4b-4281-b951-d872f2087c98
22 files changed