Add flag to enable web content to invoke web intents.

R=jhawkins@chromium.org,darin@chromium.org
BUG=None


Review URL: https://chromiumcodereview.appspot.com/11187058

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@164124 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed