Move checking of configured policy on win to breakpad client

also fix the mac implementation to also support "disabled by policy"

BUG=247431
R=rsesek@chromium.org

Review URL: https://codereview.chromium.org/27031002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228629 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228629