Obvious/zcache — pull request #16 by x-ma (2013-08-07 20:18:46+00:00)
Title: Add an API to get the number of keys in the InMemoryCache

Hello @ArtemTitoulenko,

Please review the following commits I made in branch 'xiao-add-key-count'.

509fe14c53a82b84eb58e0228fd2510983300d85 (2013-08-07 13:18:21 -0700)
Add an API to get the number of keys in the InMemoryCache

R=@ArtemTitoulenko