mash: Migrate ScopedTargetRootWindow to //ash/common

ash/common/wm/window_cycle_list.cc

 // Copyright 2014 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/wm/window_cycle_list.h"
 
 #include <list>
 #include <map>
 
 #include "ash/common/ash_switches.h"
@@ skipping 366 matching lines @@
 }
 
 WindowCycleList::WindowCycleList(const WindowList& windows)
     : windows_(windows), current_index_(0), cycle_view_(nullptr) {
   WmShell::Get()->mru_window_tracker()->SetIgnoreActivations(true);
 
   for (WmWindow* window : windows_)
     window->AddObserver(this);
 
   if (ShouldShowUi()) {
-    WmWindow* root_window = WmShell::Get()->GetRootWindowForNewWindows();
+    WmWindow* root_window = WmShell::Get()->root_window_for_new_windows();
     views::Widget* widget = new views::Widget;
     views::Widget::InitParams params;
     params.type = views::Widget::InitParams::TYPE_WINDOW_FRAMELESS;
     params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
     params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
     params.accept_events = true;
     // TODO(estade): make sure nothing untoward happens when the lock screen
     // or a system modal dialog is shown.
     root_window->GetRootWindowController()
         ->ConfigureWidgetInitParamsForContainer(
@@ skipping 87 matching lines @@
   }
 }
 
 bool WindowCycleList::ShouldShowUi() {
   return windows_.size() > 1 &&
          base::CommandLine::ForCurrentProcess()->HasSwitch(
              switches::kAshEnableWindowCycleUi);
 }
 
 }  // namespace ash