[Refactor] Consolidate the logic for whether a widget can be activated.

ash/wm/overview/window_selector_window.cc

 // Copyright 2013 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/wm/overview/window_selector_window.h"
 
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/overview/scoped_transform_overview_window.h"
 #include "grit/ash_resources.h"
 #include "ui/aura/window.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/compositor/scoped_layer_animation_settings.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/transform.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
 namespace {
 
 views::Widget* CreateCloseWindowButton(aura::Window* root_window,
                                        views::ButtonListener* listener) {
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params;
   params.type = views::Widget::InitParams::TYPE_POPUP;
-  params.can_activate = false;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
   params.parent =
       Shell::GetContainer(root_window, ash::kShellWindowId_OverlayContainer);
   widget->set_focus_on_creation(false);
   widget->Init(params);
   views::ImageButton* button = new views::ImageButton(listener);
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   button->SetImage(views::CustomButton::STATE_NORMAL,
       rb.GetImageSkiaNamed(IDR_AURA_WINDOW_OVERVIEW_CLOSE));
@@ skipping 126 matching lines @@
       settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
           ScopedTransformOverviewWindow::kTransitionMilliseconds));
       close_button_->GetNativeWindow()->SetTransform(close_button_transform);
     } else {
       close_button_->GetNativeWindow()->SetTransform(close_button_transform);
     }
   }
 }
 
 }  // namespace ash