Prepare fullscreen_chromeos.cc to be used for ozone builds.

chrome/browser/fullscreen_ash.cc

 // Copyright (c) 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 "chrome/browser/fullscreen.h"
 
 #include "ash/root_window_controller.h"
-#include "chrome/browser/ui/ash/ash_util.h"
+#include "services/service_manager/runner/common/client_util.h"
 
 bool IsFullScreenMode() {
-  if (chrome::IsRunningInMash()) {
+  if (service_manager::ServiceManagerIsRemote()) {
     // TODO: http://crbug.com/640390.
     NOTIMPLEMENTED();
     return false;
   }
   // TODO(oshima): Fullscreen is per display state. Investigate
   // and fix if necessary.
   ash::RootWindowController* controller =
       ash::RootWindowController::ForTargetRootWindow();
   return controller && controller->GetWindowForFullscreenMode();
 }