_manage_request_stats decorator was buggy ('request' not defined).  Put the code from it into the one method it was decorating.
_manage_request_stats decorator was buggy ('request' not defined).  Put the code from it into the one method it was decorating.

R=tonyg@chromium.org

Review URL: https://codereview.chromium.org/139293008

git-svn-id: abd770af2affaf62930f25b244f6edafe8ddae5b@531 164481a5-15cb-f69f-4b93-856c5b7754c5

colin-scott/web-page-replay,chromium/web-page-replay,bpsinc-native/src_third_party_webpagereplay,bpsinc-native/src_third_party_webpagereplay,bpsinc-native/src_third_party_webpagereplay,andrey-malets/web-page-replay,ting-yuan/web-page-replay,ting-yuan/web-page-replay,snorp/web-page-replay,colin-scott/web-page-replay,chromium/web-page-replay,andrey-malets/web-page-replay,snorp/web-page-replay