Blacklist PDF Browser Plugin on Mac for now.
Blacklist PDF Browser Plugin on Mac for now.

Add more comprehensive whitelist/blacklist logic so that we can easily switch defaults.

BUG=24918,26110
TEST=Install plugin, follow a link to a PDF; you should not get a page with nothing but a crash notification for the plugin.

Review URL: http://codereview.chromium.org/342029

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@30535 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