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

ash/wm/overview/window_overview.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_overview.h"
 
 #include <algorithm>
 
 #include "ash/accessibility_delegate.h"
 #include "ash/metrics/user_metrics_recorder.h"
@@ skipping 409 matching lines @@
                             window_size.height());
     target_bounds.Inset(kWindowMargin, kWindowMargin);
     windows[i]->SetBounds(root_window, target_bounds, animate);
   }
 }
 
 void WindowOverview::InitializeSelectionWidget() {
   selection_widget_.reset(new views::Widget);
   views::Widget::InitParams params;
   params.type = views::Widget::InitParams::TYPE_POPUP;
-  params.can_activate = false;
   params.keep_on_top = false;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.opacity = views::Widget::InitParams::OPAQUE_WINDOW;
   params.parent = Shell::GetContainer(windows_->front()->GetRootWindow(),
                                       kShellWindowId_DefaultContainer);
   params.accept_events = false;
   selection_widget_->set_focus_on_creation(false);
   selection_widget_->Init(params);
   views::View* content_view = new views::View;
   content_view->set_background(
       views::Background::CreateSolidBackground(kWindowOverviewSelectionColor));
   selection_widget_->SetContentsView(content_view);
   selection_widget_->Show();
   selection_widget_->GetNativeWindow()->parent()->StackChildAtBottom(
       selection_widget_->GetNativeWindow());
   selection_widget_->GetNativeWindow()->layer()->SetOpacity(
       kWindowOverviewSelectionOpacity);
 }
 
 gfx::Rect WindowOverview::GetSelectionBounds(size_t index) {
   gfx::Rect bounds((*windows_)[index]->bounds());
   bounds.Inset(-kWindowOverviewSelectionPadding,
                -kWindowOverviewSelectionPadding);
   return bounds;
 }
 
 }  // namespace ash