mash: Convert FocusCycler to wm common types and move to //ash/common

chrome/browser/chromeos/login/ui/webui_login_view.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 "chrome/browser/chromeos/login/ui/webui_login_view.h"
 
+#include "ash/common/focus_cycler.h"
+#include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "base/values.h"
@@ skipping 419 matching lines @@
     return false;
 
   // Focus is accepted, but the Ash system tray is not available in Mash, so
   // exit early.
   if (chrome::IsRunningInMash())
     return true;
 
   ash::SystemTray* tray = ash::Shell::GetInstance()->GetPrimarySystemTray();
   if (tray && tray->GetWidget()->IsVisible()) {
     tray->SetNextFocusableView(this);
-    ash::Shell::GetInstance()->RotateFocus(reverse ? ash::Shell::BACKWARD :
-                                                    ash::Shell::FORWARD);
+    ash::WmShell::Get()->focus_cycler()->RotateFocus(
+        reverse ? ash::FocusCycler::BACKWARD : ash::FocusCycler::FORWARD);
   }
 
   return true;
 }
 
 void WebUILoginView::RequestMediaAccessPermission(
     WebContents* web_contents,
     const content::MediaStreamRequest& request,
     const content::MediaResponseCallback& callback) {
   MediaStreamDevicesController controller(web_contents, request, callback);
@@ skipping 91 matching lines @@
   if (should_emit_login_prompt_visible_) {
     VLOG(1) << "Login WebUI >> login-prompt-visible";
     chromeos::DBusThreadManager::Get()->GetSessionManagerClient()->
         EmitLoginPromptVisible();
   }
 
   webui_visible_ = true;
 }
 
 }  // namespace chromeos