Use memcache and limit / to 15 last status.
Use memcache and limit / to 15 last status.

Review URL: http://codereview.chromium.org/399071

git-svn-id: fcf5dad22b2b9f051ac9862410c0bc750906fb3b@32333 0039d316-1c4b-4281-b951-d872f2087c98

nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra