touchui: Fix a crash on consecutive volume/brightness bubble display.

views/bubble/bubble_delegate.cc

Index: views/bubble/bubble_delegate.cc
diff --git a/views/bubble/bubble_delegate.cc b/views/bubble/bubble_delegate.cc
index 9f997473d95c7a2efa90dfb7d8e5c4caf7a0d854..0e114915eb3e4debb4ac1af73229332f73d67be2 100644
--- a/views/bubble/bubble_delegate.cc
+++ b/views/bubble/bubble_delegate.cc
@@ -22,8 +22,6 @@ Widget* CreateBubbleWidget(BubbleDelegateView* bubble, Widget* parent) {
   bubble_params.delegate = bubble;
   bubble_params.transparent = true;
   bubble_params.parent_widget = parent;
-  if (!bubble_params.parent_widget)
-    bubble_params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
 #if defined(OS_WIN) && !defined(USE_AURA)
   bubble_params.type = Widget::InitParams::TYPE_WINDOW_FRAMELESS;
   bubble_params.transparent = false;