Revert 6745 "Refactor StatsCollector and associated types."
Broke build on android.
> Refactor StatsCollector and associated types.
> * Due to the type changes, I'm going to update the OnCompleted event in two phases to sync with Chrome. This is the first phase.
> * Reports are now managed in a set, not a map, since it's enough to store the id in one place.
> * Report ids are now const.
> * Copying of data has been greatly reduced.
> * This change includes preparation work for making GetStats fully async.
>
> R=xians@webrtc.org
>
> Review URL: https://webrtc-codereview.appspot.com/18819004
TBR=tommi@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/16139004
git-svn-id: http://webrtc.googlecode.com/svn/trunk/talk@6746 4adac7df-926f-26a2-2b94-8c16560cd09d
7 files changed
