iwyu: Include callback_old.h where appropriate, final.

BUG=82098
TEST=none

Review URL: http://codereview.chromium.org/7003003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@85003 0039d316-1c4b-4281-b951-d872f2087c98
UrlmonUrlRequestManager::UrlmonUrlRequestManager()
    : stopping_(false), calling_delegate_(0), notification_window_(NULL),
      privileged_mode_(false),
      container_(NULL) {
}

UrlmonUrlRequestManager::UrlmonUrlRequestManager()
    : stopping_(false), calling_delegate_(0), notification_window_(NULL),
      privileged_mode_(false),
      container_(NULL) {
}
