Fix activation issues with SystemTrayBubble.

ash/system/network/network_state_list_detailed_view.cc

Index: ash/system/network/network_state_list_detailed_view.cc
diff --git a/ash/system/network/network_state_list_detailed_view.cc b/ash/system/network/network_state_list_detailed_view.cc
index 9bb2996a76d0edef330e9745a9714a3be2509109..e53221b531049049c680f7fbd7d7a6ddb20f7234 100644
--- a/ash/system/network/network_state_list_detailed_view.cc
+++ b/ash/system/network/network_state_list_detailed_view.cc
@@ -127,7 +127,6 @@ class NetworkStateListDetailedView::InfoBubble
     set_shadow(views::BubbleBorder::NO_ASSETS);
     set_anchor_view_insets(gfx::Insets(0, 0, kBubbleMargin, 0));
     set_notify_enter_exit_on_child(true);
-    set_close_on_deactivate(true);
     SetLayoutManager(new views::FillLayout());
     AddChildView(content);
   }
@@ -392,13 +391,8 @@ void NetworkStateListDetailedView::ToggleInfoBubble() {
 bool NetworkStateListDetailedView::ResetInfoBubble() {
   if (!info_bubble_)
     return false;
-  // After losing activation, the InfoBubble will be closed.
-  owner()
-      ->system_tray()
-      ->GetSystemBubble()
-      ->bubble_view()
-      ->GetWidget()
-      ->Activate();
+
+  info_bubble_->GetWidget()->Close();
   return true;
 }