Remove third_party/active_doc now that Chrome Frame is gone.

BUG=98113,316496
R=phajdan.jr@chromium.org,torne@chromium.org
TBR=cpu@chromium.org,torne@chromium.org

Review URL: https://codereview.chromium.org/131913006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244516 0039d316-1c4b-4281-b951-d872f2087c98
Use a Finch Experiment to control the Browser Blacklist

Also increase the states stored in the register to prevent
the setup code from running multiple times per version if
it fails to start one time.

Also, this uses RegQueryValueEx and RegSetValueEx
instead of RegSetKeyValue and RegGetValue since 
they aren't available on XP.

TBR=sky@chromium.org
BUG=329023

Review URL: https://codereview.chromium.org/133923002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244517 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244517