Don't show tray on OOBE boot

Don't show tray on OOBE boot.
New OOBE boot up sequence revealed an issue when tray was shown on boot, then hidden again.

1. OOBE WebUI is not initialized as it waits for wallpaper animation to finish. That means tray was not hidden by WebUI.
3. Wallpaper animations happens
4. At some point tray is shown
5. WebUI is initialized, tray is hidden.

BUG=133279
TEST=Manual

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=148387

[Nikita (slow), 2012-07-25 17:33:58]

Sadrul, please take a look.

[sadrul, 2012-07-25 17:47:28]

LGTM

http://codereview.chromium.org/10827009/diff/2001/chrome/browser/chromeos/log...
File chrome/browser/chromeos/login/webui_login_view.cc (right):

http://codereview.chromium.org/10827009/diff/2001/chrome/browser/chromeos/log...
chrome/browser/chromeos/login/webui_login_view.cc:240: // Tray may have been
initialized being hidden.
Do you know when/why this happens?

[Nikita (slow), 2012-07-25 17:54:17]

http://codereview.chromium.org/10827009/diff/2001/chrome/browser/chromeos/log...
File chrome/browser/chromeos/login/webui_login_view.cc (right):

http://codereview.chromium.org/10827009/diff/2001/chrome/browser/chromeos/log...
chrome/browser/chromeos/login/webui_login_view.cc:240: // Tray may have been
initialized being hidden.
On 2012/07/25 17:47:28, sadrul wrote:
> Do you know when/why this happens?

That is how it is initialized if it needs to be hidden:
SetVisible(ash::Shell::GetInstance()->tray_delegate()->
      GetTrayVisibilityOnStartup());

  status_area_widget_ = new internal::StatusAreaWidget();
  status_area_widget_->CreateTrayViews(delegate_.get());
  status_area_widget_->Show();

[sadrul, 2012-07-25 17:56:27]

http://codereview.chromium.org/10827009/diff/2001/chrome/browser/chromeos/log...
File chrome/browser/chromeos/login/webui_login_view.cc (right):

http://codereview.chromium.org/10827009/diff/2001/chrome/browser/chromeos/log...
chrome/browser/chromeos/login/webui_login_view.cc:240: // Tray may have been
initialized being hidden.
On 2012/07/25 17:54:17, Nikita Kostylev wrote:
> On 2012/07/25 17:47:28, sadrul wrote:
> > Do you know when/why this happens?
> 
> That is how it is initialized if it needs to be hidden:
> SetVisible(ash::Shell::GetInstance()->tray_delegate()->
>       GetTrayVisibilityOnStartup());
> 
>   status_area_widget_ = new internal::StatusAreaWidget();
>   status_area_widget_->CreateTrayViews(delegate_.get());
>   status_area_widget_->Show();

Ah, cool. Thanks!

[commit-bot: I haz the power, 2012-07-25 18:27:42]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nkostylev@chromium.org/10827009/2001

[commit-bot: I haz the power, 2012-07-25 19:58:26]

Change committed as 148387