Enabled using viewport on desktop browsers behind experimental flag

Source/core/rendering/RenderView.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 240 matching lines @@
 #ifndef NDEBUG
     void checkLayoutState(const LayoutState&);
 #endif
 
     size_t getRetainedWidgets(Vector<RenderWidget*>&);
     void releaseWidgets(Vector<RenderWidget*>&);
     
     friend class LayoutStateMaintainer;
     friend class LayoutStateDisabler;
 
+    // This will be true for platforms without resizable windows like phones and tablets
+    bool hasFixedViewportSize() const;
+
 protected:
     FrameView* m_frameView;
 
     RenderObject* m_selectionStart;
     RenderObject* m_selectionEnd;
     int m_selectionStartPos;
     int m_selectionEndPos;
 
     int m_maximalOutlineSize; // Used to apply a fudge factor to dirty-rect checks on blocks/tables.
 
@@ skipping 130 matching lines @@
     RenderObject::FlowThreadState m_flowThreadState;
     bool m_fragmenting;
 #ifndef NDEBUG
     LayoutState* m_layoutState;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // RenderView_h