Do not activate system tray bubble by default

ash/common/system/tray/tray_item_more.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/tray_item_more.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/system/tray/fixed_sized_image_view.h"
 #include "ash/common/system/tray/system_tray_item.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_popup_item_style.h"
 #include "ash/resources/vector_icons/vector_icons.h"
 #include "grit/ash_resources.h"
 #include "ui/accessibility/ax_view_state.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/box_layout.h"
 
 namespace ash {
 
 TrayItemMore::TrayItemMore(SystemTrayItem* owner, bool show_more)
-    : owner_(owner),
+    : ActionableView(owner),
       show_more_(show_more),
       icon_(nullptr),
       label_(nullptr),
       more_(nullptr) {
   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
                                         kTrayPopupPaddingHorizontal, 0,
                                         kTrayPopupPaddingBetweenItems));
 
   icon_ = new FixedSizedImageView(0, GetTrayConstant(TRAY_POPUP_ITEM_HEIGHT));
   AddChildView(icon_);
@@ skipping 79 matching lines @@
   if (!accessible_name_.empty())
     state->name = accessible_name_;
 }
 
 void TrayItemMore::OnNativeThemeChanged(const ui::NativeTheme* theme) {
   ActionableView::OnNativeThemeChanged(theme);
   UpdateStyle();
 }
 
 }  // namespace ash