Revert 37061 because it caused ui_tests to not finish.

TBR=estade
TEST=none
BUG=none
Review URL: http://codereview.chromium.org/549155

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37075 0039d316-1c4b-4281-b951-d872f2087c98
void BrowserActionButton::Observe(NotificationType type,
                                  const NotificationSource& source,
                                  const NotificationDetails& details) {
  if (type == NotificationType::EXTENSION_BROWSER_ACTION_UPDATED) {
    UpdateState();
    panel_->OnBrowserActionVisibilityChanged();
  } else {
    NOTREACHED() << L"Received unexpected notification";
  }
}

void BrowserActionButton::Observe(NotificationType type,
                                  const NotificationSource& source,
                                  const NotificationDetails& details) {
  if (type == NotificationType::EXTENSION_BROWSER_ACTION_UPDATED) {
    UpdateState();
    panel_->OnBrowserActionVisibilityChanged();
  } else {
    NOTREACHED() << L"Received unexpected notification";
  }
}
