WebDatabase: check path traversal in origin_identifier

BUG=172264


Review URL: https://chromiumcodereview.appspot.com/12212091

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@183141 0039d316-1c4b-4281-b951-d872f2087c98
DatabaseMessageFilter::~DatabaseMessageFilter() {
}

DatabaseMessageFilter::~DatabaseMessageFilter() {
}
