Revert of Revert of Move service_discovery_client_impl.* into chrome/common.

Revert of Revert of Move  service_discovery_client_impl.* into chrome/common. (https://codereview.chromium.org/250793011/)

Reason for revert:
Reland original patch. The revert didn't solve the sizes regression.

Original issue's description:
> Revert of Move  service_discovery_client_impl.* into chrome/common. (https://codereview.chromium.org/256923003/)
> 
> Reason for revert:
> [Sheriff] Speculating that this lead to a sizes regression:
> https://chromeperf.appspot.com/report?masters=Chromium&bots=chromium-rel-linux-64&tests=sizes&rev=266525&checked=core
> 
> Will reland otherwise.
> 
> Original issue's description:
> > Move  service_discovery_client_impl.* into chrome/common.
> > It's need to be used by utility and browser processes.
> > 
> > BUG=349645
> > 
> > Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266487
> 
> TBR=thestig@chromium.org,vitalybuka@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=349645
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266535

TBR=thestig@chromium.org,vitalybuka@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=349645
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266560

[Michael Achenbach, 2014-04-28 14:03:06]

Created Revert of Revert of Move  service_discovery_client_impl.* into
chrome/common.

[commit-bot: I haz the power, 2014-04-28 14:03:31]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/machenbach@chromium.org/252023003/1

[commit-bot: I haz the power, 2014-04-28 14:18:37]

Change committed as 266560