Adds Chromecast hardware information to SystemProfileProto.

Adds Chromecast hardware information to SystemProfileProto.

This information is already being collected and stored in UMA, but
has been kept internal. Updating public proto to match the internal
proto.

R=isherman@chromium.org,asvitkine@chromium.org,ghines@chromium.org
CC=lcwu@chromium.org
BUG=400925
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=290012

[Alexei Svitkine (slow), 2014-08-14 15:28:32]

LGTM assuming it's the exact same content as the internal version.

[gunsch, 2014-08-15 17:01:46]

The CQ bit was checked by gunsch@chromium.org

[gunsch, 2014-08-15 17:02:15]

On 2014/08/14 15:28:32, Alexei Svitkine wrote:
> LGTM assuming it's the exact same content as the internal version.

Copied from our local version, then diffed against google3 copy to be sure.
Thanks for looking.

[commit-bot: I haz the power, 2014-08-15 17:03:45]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/gunsch@chromium.org/465133003/1

[commit-bot: I haz the power, 2014-08-15 19:37:07]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_dbg_tri...)

[commit-bot: I haz the power, 2014-08-15 21:25:50]

Committed patchset #1 (1) as 290012