GTK: Fix crash on avatar bubble close

GTK: Fix crash on avatar bubble close

If the avatar bubble closed while opening a profile we would crash.

Here's the sequence of events:
   AvatarMenuBubbleGtk::OpenProfile
      ->SwitchToProfile();
          ...
            AvatarMenuBubbleGtk::OnDestroy()
                delete this;
      this->bubble_->Close();  <--- crash here because this is deleted

To prevent these kinds of errors I changed the OnDestory() code to use MessageLoop::DeleteSoon(). This ensures that there no AvatarMenuBubbleGtk functions are in the backtrace when the bubble is deleted.

BUG=106640
TEST=Reprorduced the crash. Applied my patch and verified that it no longer crashed.


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=113717

[Elliot Glaysher, 2011-12-08 21:41:22]

lgtm

[commit-bot: I haz the power, 2011-12-08 21:42:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sail@chromium.org/8889027/1

[commit-bot: I haz the power, 2011-12-09 00:54:55]

Change committed as 113717