Add an observer interface for VariationsService.
commit591ff14376dc4d6e59aa338038c0bac05bd9b261
authorasvitkine@chromium.org <asvitkine@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Fri, 27 Jun 2014 06:08:25 +0000 (27 06:08 +0000)
committerasvitkine@chromium.org <asvitkine@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Fri, 27 Jun 2014 06:08:25 +0000 (27 06:08 +0000)
tree131bfabf5e7bff898373f343386ed0fa0187c270
parent5c5291df2649a2d86c55f229a42fe3a50577a171
Add an observer interface for VariationsService.

The interface is used to notify interested parties
(i.e. UI that should be badged) about experiment
detected experiment changes that will happen on a
restart.

Actual observers will come in a later CL.

BUG=315807

Review URL: https://codereview.chromium.org/288753003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@280249 0039d316-1c4b-4281-b951-d872f2087c98
chrome/browser/metrics/variations/variations_service.cc
chrome/browser/metrics/variations/variations_service.h
chrome/browser/metrics/variations/variations_service_unittest.cc