cros: do not try to activate system tray bubble if it is in process of closing

ash/common/system/tray/system_tray.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/system/tray/system_tray.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
@@ skipping 680 matching lines @@
       base::Bind(&SystemTray::ActivateAndStartNavigation,
                  base::Unretained(this)));
   key_event_watcher_->AddKeyEventCallback(
       ui::Accelerator(ui::VKEY_TAB, ui::EF_SHIFT_DOWN),
       base::Bind(&SystemTray::ActivateAndStartNavigation,
                  base::Unretained(this)));
 }
 
 void SystemTray::ActivateBubble() {
   TrayBubbleView* bubble_view = GetSystemBubble()->bubble_view();
+  // If system tray bubble is in the process of closing, do not try to activate
+  // bubble.
+  if (bubble_view->GetWidget()->IsClosed())
+    return;
   bubble_view->set_can_activate(true);
   bubble_view->GetWidget()->Activate();
 }
 
 bool SystemTray::PerformAction(const ui::Event& event) {
   // If we're already showing the default view, hide it; otherwise, show it
   // (and hide any popup that's currently shown).
   if (HasSystemBubbleType(SystemTrayBubble::BUBBLE_TYPE_DEFAULT)) {
     system_bubble_->bubble()->Close();
   } else {
@@ skipping 38 matching lines @@
           .work_area()
           .height();
   if (work_area_height > 0) {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
         "Ash.SystemMenu.PercentageOfWorkAreaHeightCoveredByMenu",
         100 * bubble_view->height() / work_area_height, 1, 300, 100);
   }
 }
 
 }  // namespace ash