login: Do not tell GTK to do double buffering. Views already takes ca…

…re of it.

This fixes the painting issue of the icons when highlighted.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7831018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99271 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/login/webui_login_view.cc

@@ -243,7 +243,6 @@ void WebUILoginView::InitStatusArea() {
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
 #endif
   widget_params.bounds = bounds;
-  widget_params.double_buffer = true;
   widget_params.transparent = true;
   widget_params.parent = login_window->GetNativeView();
   status_window_ = new views::Widget;