Do not activate system tray bubble by default

ash/common/system/update/tray_update.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/update/tray_update.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/metrics/user_metrics_action.h"
 #include "ash/common/system/tray/fixed_sized_image_view.h"
 #include "ash/common/system/tray/system_tray.h"
@@ skipping 62 matching lines @@
       return for_menu ? gfx::kGoogleRed700 : gfx::kGoogleRed300;
     default:
       NOTREACHED();
       break;
   }
   return default_color;
 }
 
 class UpdateView : public ActionableView {
  public:
-  explicit UpdateView(const UpdateInfo& info) {
+  explicit UpdateView(SystemTrayItem* owner, const UpdateInfo& info)

[James Cook, 2016/09/22 21:17:17]

no explicit

[oshima, 2016/09/23 09:37:20]

Done.

+      : ActionableView(owner) {
     SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
                                           kTrayPopupPaddingHorizontal, 0,
                                           kTrayPopupPaddingBetweenItems));
 
     ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
     views::ImageView* image =
         new FixedSizedImageView(0, GetTrayConstant(TRAY_POPUP_ITEM_HEIGHT));
     if (MaterialDesignController::IsSystemTrayMenuMaterial()) {
       image->SetImage(gfx::CreateVectorIcon(
           kSystemMenuUpdateIcon,
@@ skipping 14 matching lines @@
   }
 
   ~UpdateView() override {}
 
  private:
   // Overridden from ActionableView.
   bool PerformAction(const ui::Event& event) override {
     WmShell::Get()->system_tray_delegate()->RequestRestartForUpdate();
     WmShell::Get()->RecordUserMetricsAction(
         UMA_STATUS_AREA_OS_UPDATE_DEFAULT_SELECTED);
+    CloseSystemBubble();
     return true;
   }
 
   DISALLOW_COPY_AND_ASSIGN(UpdateView);
 };
 
 }  // namespace
 
 TrayUpdate::TrayUpdate(SystemTray* system_tray)
     : TrayImageItem(system_tray, IDR_AURA_UBER_TRAY_UPDATE, UMA_UPDATE) {
   WmShell::Get()->system_tray_notifier()->AddUpdateObserver(this);
 }
 
 TrayUpdate::~TrayUpdate() {
   WmShell::Get()->system_tray_notifier()->RemoveUpdateObserver(this);
 }
 
 bool TrayUpdate::GetInitialVisibility() {
   UpdateInfo info;
   WmShell::Get()->system_tray_delegate()->GetSystemUpdateInfo(&info);
   return info.update_required;
 }
 
 views::View* TrayUpdate::CreateDefaultView(LoginStatus status) {
   UpdateInfo info;
   WmShell::Get()->system_tray_delegate()->GetSystemUpdateInfo(&info);
-  return info.update_required ? new UpdateView(info) : nullptr;
+  return info.update_required ? new UpdateView(this, info) : nullptr;
 }
 
 void TrayUpdate::OnUpdateRecommended(const UpdateInfo& info) {
   if (MaterialDesignController::UseMaterialDesignSystemIcons())
     SetIconColor(IconColorForUpdateSeverity(info.severity, false));
   else
     SetImageFromResourceId(DecideResource(info.severity, false));
   tray_view()->SetVisible(true);
 }
 
 }  // namespace ash