Add a partial Mojo serial connection interface and implementation.

Add a partial Mojo serial connection interface and implementation.

This adds a Connect method to SerialService and a new partly complete
Connection interface. This change includes methods for:
- setting connection options
- getting connection info
- setting host control signals
- getting device control signals
- flushing buffers

BUG=389016
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284399

[darin (slow to review), 2014-07-18 04:46:15]

serial.mojom LGTM. i'd consider adding some comments though to better explain
the API flow.

https://codereview.chromium.org/401563002/diff/80001/device/serial/serial.mojom
File device/serial/serial.mojom (right):

https://codereview.chromium.org/401563002/diff/80001/device/serial/serial.moj...
device/serial/serial.mojom:86: Connection& connection_request);
nit: stylistically, i think it is OK to call this parameter just "connection".
you could think of it as you are connecting the connection object to the serial
service.

[Ken Rockot(use gerrit already), 2014-07-18 17:51:18]

lgtm

[Sam McNally, 2014-07-21 03:25:38]

https://codereview.chromium.org/401563002/diff/80001/device/serial/serial.mojom
File device/serial/serial.mojom (right):

https://codereview.chromium.org/401563002/diff/80001/device/serial/serial.moj...
device/serial/serial.mojom:86: Connection& connection_request);
On 2014/07/18 04:46:15, darin wrote:
> nit: stylistically, i think it is OK to call this parameter just "connection".
> you could think of it as you are connecting the connection object to the
serial
> service.

Done.

[Sam McNally, 2014-07-21 03:26:09]

The CQ bit was checked by sammc@chromium.org

[commit-bot: I haz the power, 2014-07-21 03:26:34]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sammc@chromium.org/401563002/140001

[commit-bot: I haz the power, 2014-07-21 07:18:37]

Change committed as 284399