Fix CRD opens a window every time it's clicked in the launcher

Fix CRD opens a window every time it's clicked in the launcher

Cause:
This is a regression of the HRD change, in which we pass in an unique
ID everytime when we create an app window.  This causes a new window
to be created whenever the user clicks on the app icon in the app
launcher.

Fix:
Only create a new app window when:
1. There are no existing windows or
2. The user clicks on the New Window context menu

BUG=448128
Committed: https://crrev.com/81b9425c45c6ec20805385070ee69085c2cc426a
Cr-Commit-Position: refs/heads/master@{#311545}

[kelvinp, 2015-01-14 00:51:41]

PTAL

[Jamie, 2015-01-14 03:07:23]

jamiewalch@chromium.org changed reviewers:
+ jamiewalch@chromium.org

[Jamie, 2015-01-14 03:07:24]

lgtm

https://codereview.chromium.org/844503007/diff/1/remoting/webapp/crd/js/backg...
File remoting/webapp/crd/js/background.js (right):

https://codereview.chromium.org/844503007/diff/1/remoting/webapp/crd/js/backg...
remoting/webapp/crd/js/background.js:57: return;
I think an else would be more readable than an early return here.

[kelvinp, 2015-01-14 19:35:08]

The CQ bit was checked by kelvinp@chromium.org

[kelvinp, 2015-01-14 19:35:11]

The CQ bit was unchecked by kelvinp@chromium.org

[kelvinp, 2015-01-14 19:41:20]

FYI

[kelvinp, 2015-01-14 19:41:23]

The CQ bit was checked by kelvinp@chromium.org

[commit-bot: I haz the power, 2015-01-14 19:41:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/844503007/20001

[commit-bot: I haz the power, 2015-01-14 21:05:50]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-14 21:06:49]

Patchset 2 (id:??) landed as
https://crrev.com/81b9425c45c6ec20805385070ee69085c2cc426a
Cr-Commit-Position: refs/heads/master@{#311545}