Revert 235562 "Initialize DomDistillerStore"

Seems to break compile on http://build.chromium.org/p/chromium/builders/Linux/builds/44953

dom_distiller_service_factory.cc:45:52:error: invalid use of incomplete type 'struct base::SequencedWorkerPool'

> Initialize DomDistillerStore
> 
> Needed as part of setting up the DomDistillerBrowserContextKeyedService.
> Distilled articles will be stored in an "Articles" directory in the
> user's profile directory.
> BUG=288015
> 
> Review URL: https://codereview.chromium.org/63553009

TBR=yfriedman@chromium.org

Review URL: https://codereview.chromium.org/60043004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235568 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235568