Fix mouse cursor update timer to be page-global instead of per-frame

Source/core/page/Chrome.cpp

 /*
  * Copyright (C) 2006, 2007, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2012, Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 318 matching lines @@
     m_client->runOpenPanel(frame, fileChooser);
 }
 
 void Chrome::dispatchViewportPropertiesDidChange(const ViewportDescription& description) const
 {
     m_client->dispatchViewportPropertiesDidChange(description);
 }
 
 void Chrome::setCursor(const Cursor& cursor)
 {
+    m_lastSetMouseCursorForTesting = cursor;
     m_client->setCursor(cursor);
 }
 
+Cursor Chrome::getLastSetCursorForTesting() const
+{
+    return m_lastSetMouseCursorForTesting;
+}
+
 void Chrome::scheduleAnimation()
 {
     m_page->animator().setAnimationFramePending();
     m_client->scheduleAnimation();
 }
 
 // --------
 
 void Chrome::scheduleAnimationForFrame(LocalFrame* localRoot)
 {
@@ skipping 36 matching lines @@
 {
     m_client->registerViewportLayers();
 }
 
 void Chrome::willBeDestroyed()
 {
     m_client->chromeDestroyed();
 }
 
 } // namespace blink