Include scrollbar size in @media width/height

Source/core/platform/ScrollView.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 233 matching lines @@
 
 void ScrollView::setUseFixedLayout(bool enable)
 {
     if (useFixedLayout() == enable)
         return;
     m_useFixedLayout = enable;
     updateScrollbars(scrollOffset());
     contentsResized();
 }
 
+IntSize ScrollView::mediaSize() const
+{
+    return m_fixedLayoutSize.isEmpty() || !m_useFixedLayout ? unscaledVisibleContentSize(IncludeScrollbars) : m_fixedLayoutSize;
+}
+
 IntSize ScrollView::contentsSize() const
 {
     return m_contentsSize;
 }
 
 void ScrollView::setContentsSize(const IntSize& newSize)
 {
     if (contentsSize() == newSize)
         return;
     m_contentsSize = newSize;
@@ skipping 1007 matching lines @@
 {
 }
 
 bool ScrollView::platformIsOffscreen() const
 {
     return false;
 }
 
 
 }