Fix webreply/third_party/dns import
Fix webreply/third_party/dns import

BUG=493869
R=nednguyen@google.com

Review URL: https://codereview.appspot.com/246750043

Patch from Cheng-Yu Lee <cylee@google.com>.

chromium/web-page-replay,chromium/web-page-replay,snorp/web-page-replay,snorp/web-page-replay,ting-yuan/web-page-replay,ting-yuan/web-page-replay,andrey-malets/web-page-replay,andrey-malets/web-page-replay