Add note about availability to printerProvider API description

Add note about availability to printerProvider API description

The API is available only on Chrome 42 dev channel, but it's listed
as a stable API since 40 on developer.chrome.com
Adding a note about availability yo API description until this is
fixed.

Committed: https://crrev.com/718d3b4537b49785d29e5fb4eb9b164d010785d6
Cr-Commit-Position: refs/heads/master@{#317414}

[tbarzic, 2015-02-20 21:03:21]

tbarzic@chromium.org changed reviewers:
+ kalman@chromium.org

[not at google - send to devlin, 2015-02-20 21:05:27]

avaiability --> availability

https://codereview.chromium.org/944103002/diff/1/extensions/common/api/printe...
File extensions/common/api/printer_provider.idl (right):

https://codereview.chromium.org/944103002/diff/1/extensions/common/api/printe...
extensions/common/api/printer_provider.idl:8: // Available only on dev channel
since Chrome 42.
Use <p>..</p> not <br>.

[not at google - send to devlin, 2015-02-20 21:05:32]

lgtm

[tbarzic, 2015-02-20 21:09:26]

New patchsets have been uploaded after l-g-t-m from kalman@chromium.org

[tbarzic, 2015-02-20 21:10:12]

https://codereview.chromium.org/944103002/diff/1/extensions/common/api/printe...
File extensions/common/api/printer_provider.idl (right):

https://codereview.chromium.org/944103002/diff/1/extensions/common/api/printe...
extensions/common/api/printer_provider.idl:8: // Available only on dev channel
since Chrome 42.
On 2015/02/20 21:05:27, kalman wrote:
> Use <p>..</p> not <br>.

Done.

[tbarzic, 2015-02-20 21:10:15]

The CQ bit was checked by tbarzic@chromium.org

[commit-bot: I haz the power, 2015-02-20 21:11:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/944103002/20001

[commit-bot: I haz the power, 2015-02-20 22:00:12]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-20 22:01:49]

Patchset 2 (id:??) landed as
https://crrev.com/718d3b4537b49785d29e5fb4eb9b164d010785d6
Cr-Commit-Position: refs/heads/master@{#317414}