Password bubble: Don't focus by default.

Password bubble: Don't focus by default.

This is the duplicate of https://codereview.chromium.org/373043003. The bubble turned to be unresponsive on Windows. This CL has a workaround. The original problem is in infrastructure. It's to be fixed in  BubbleDelegateView.
set_use_focusless(true) has adverse effect on Windows.
1) The bubble can't be the active window (which is not desired behavior).
2) The bubble doesn't get WM_LBUTTONDOWN event. Therefore, all the buttons get stuck.
We call set_use_focusless(false) after the bubble is shown. Thus, it can get focus and mouse events properly.

BUG=383821
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=283548

[vasilii, 2014-07-16 09:39:16]

Hi guys,

please review.

[Mike West, 2014-07-16 09:43:37]

On 2014/07/16 09:39:16, vasilii wrote:
> Hi guys,
> 
> please review.

What is the workaround in this CL? It looks the same as the one which we
reverted.

Is there a BubbleDelegteView CL I could look at?

-mike

[vabr (Chromium), 2014-07-16 09:46:48]

On 2014/07/16 09:39:16, vasilii wrote:
> Hi guys,
> 
> please review.

Thanks for fixing this!
LGTM, as long as it works on Windows.
I must admit that I don't understand what exactly the cause was and how the
added line in ShowBubble fixes it. I'll probably walk up to your desk and ask
you. :)

Cheers,
Vaclav

[Mike West, 2014-07-16 10:37:17]

Thanks for the explanation!

As discussed:

1. Add a note to both the new line and to the CL description explaining the
workaround, and that it can/should be removed once BubbleDelegateView is fixed.

2. Add a test if possible to verify that the bubble is indeed focusable.

[vasilii, 2014-07-16 11:25:31]

Done.

[Mike West, 2014-07-16 11:35:24]

LGTM, thanks for taking another pass.

[vasilii, 2014-07-16 11:40:20]

The CQ bit was checked by vasilii@chromium.org

[commit-bot: I haz the power, 2014-07-16 11:42:02]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/vasilii@chromium.org/396973002/20001

[commit-bot: I haz the power, 2014-07-16 22:28:29]

Change committed as 283548