Dismiss the system menu if the status area is clicked while the menu is open.

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 689 matching lines @@
   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)) {
+  // If we're already showing the menu (whatever default view or detailed view,

[tdanderson, 2017/03/30 19:54:57]

nit: no need to mention the bug number in the comments. You can just reword this
comment as:

"If we're already showing the menu, hide it. Otherwise, show it and hide any
popup that's currently shown."

+  // crbug.com/690112), hide it; otherwise, show it (and hide any popup that's
+  // currently shown).
+  if (system_bubble_.get()) {

[tdanderson, 2017/03/30 19:54:57]

nit: call HasSystemBubble() here instead

     system_bubble_->bubble()->Close();
   } else {
     ShowDefaultView(BUBBLE_CREATE_NEW);
     if (event.IsKeyEvent() || (event.flags() & ui::EF_TOUCH_ACCESSIBILITY))
       ActivateBubble();
   }
   return true;
 }
 
 void SystemTray::CloseSystemBubbleAndDeactivateSystemTray() {
@@ skipping 30 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