Cursor state should be global for desktop Aura

ui/views/widget/desktop_aura/desktop_cursor_loader_updater_auralinux.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 "ui/views/widget/desktop_aura/desktop_cursor_loader_updater_auralinux.h"
 
 #include "ui/aura/root_window.h"
 #include "ui/base/cursor/cursor_loader.h"
 #include "ui/base/cursor/cursors_aura.h"
 #include "ui/gfx/display.h"
@@ skipping 35 matching lines @@
   }
 }
 
 }  // namespace
 
 DesktopCursorLoaderUpdaterAuraLinux::DesktopCursorLoaderUpdaterAuraLinux() {}
 
 DesktopCursorLoaderUpdaterAuraLinux::~DesktopCursorLoaderUpdaterAuraLinux() {}
 
 void DesktopCursorLoaderUpdaterAuraLinux::OnCreate(
-    aura::RootWindow* window,
+    float device_scale_factor,
     ui::CursorLoader* loader) {
-  LoadImageCursors(window->compositor()->device_scale_factor(), loader);
+  LoadImageCursors(device_scale_factor, loader);
 }
 
 void DesktopCursorLoaderUpdaterAuraLinux::OnDisplayUpdated(
     const gfx::Display& display,
     ui::CursorLoader* loader) {
   LoadImageCursors(display.device_scale_factor(), loader);
 }
 
 // static
 scoped_ptr<DesktopCursorLoaderUpdater> DesktopCursorLoaderUpdater::Create() {
   return scoped_ptr<DesktopCursorLoaderUpdater>(
       new DesktopCursorLoaderUpdaterAuraLinux).Pass();
 }
 
 }  // namespace views