Block NPAPI plugins by default Add Facebook video calling and Google Earth...

Block NPAPI plugins by default Add Facebook video calling and Google Earth plugins to the tracked list.

BUG=281651

Review URL: https://codereview.chromium.org/23440066

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225316 0039d316-1c4b-4281-b951-d872f2087c98