Do not activate system tray bubble by default

ash/common/system/chromeos/bluetooth/tray_bluetooth.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/chromeos/bluetooth/tray_bluetooth.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/tray/fixed_sized_scroll_view.h"
 #include "ash/common/system/tray/hover_highlight_view.h"
@@ skipping 340 matching lines @@
       scroll_content()->SizeToPreferredSize();
       static_cast<views::View*>(scroller())->Layout();
     }
   }
 
   // TrayDetailsView:
   void HandleViewClicked(views::View* view) override {
     SystemTrayDelegate* delegate = WmShell::Get()->system_tray_delegate();
     if (view == manage_devices_) {
       delegate->ManageBluetoothDevices();
+      owner()->system_tray()->CloseSystemBubble();
       return;
     }
 
     if (view == enable_bluetooth_) {
       WmShell::Get()->RecordUserMetricsAction(
           delegate->GetBluetoothEnabled() ? UMA_STATUS_AREA_BLUETOOTH_DISABLED
                                           : UMA_STATUS_AREA_BLUETOOTH_ENABLED);
       delegate->ToggleBluetooth();
       return;
     }
@@ skipping 139 matching lines @@
     detailed_->Update();
 }
 
 void TrayBluetooth::OnBluetoothDiscoveringChanged() {
   if (!detailed_)
     return;
   detailed_->Update();
 }
 
 }  // namespace ash