Remove the concept of user stylesheets.

Source/core/page/Settings.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 121 matching lines @@
 
     void setImagesEnabled(bool);
     bool areImagesEnabled() const { return m_areImagesEnabled; }
 
     void setPluginsEnabled(bool);
     bool arePluginsEnabled() const { return m_arePluginsEnabled; }
 
     void setDNSPrefetchingEnabled(bool);
     bool dnsPrefetchingEnabled() const { return m_dnsPrefetchingEnabled; }
 
-    void setUserStyleSheetLocation(const KURL&);
-    const KURL& userStyleSheetLocation() const { return m_userStyleSheetLocation; }
-
     static void setMockScrollbarsEnabled(bool flag);
     static bool mockScrollbarsEnabled();
 
     void setTouchEventEmulationEnabled(bool enabled) { m_touchEventEmulationEnabled = enabled; }
     bool isTouchEventEmulationEnabled() const { return m_touchEventEmulationEnabled; }
 
     void setOpenGLMultisamplingEnabled(bool flag);
     bool openGLMultisamplingEnabled();
 
     void setViewportEnabled(bool);
@@ skipping 11 matching lines @@
     // overflow scroll is ready (crbug.com/254111).
     void setCompositorDrivenAcceleratedScrollingEnabled(bool enabled) { m_compositorDrivenAcceleratedScrollingEnabled = enabled; }
     bool isCompositorDrivenAcceleratedScrollingEnabled() const { return m_compositorDrivenAcceleratedScrollingEnabled; }
 
 private:
     explicit Settings(Page*);
 
     Page* m_page;
 
     String m_mediaTypeOverride;
-    KURL m_userStyleSheetLocation;
     ScriptFontFamilyMap m_standardFontFamilyMap;
     ScriptFontFamilyMap m_serifFontFamilyMap;
     ScriptFontFamilyMap m_fixedFontFamilyMap;
     ScriptFontFamilyMap m_sansSerifFontFamilyMap;
     ScriptFontFamilyMap m_cursiveFontFamilyMap;
     ScriptFontFamilyMap m_fantasyFontFamilyMap;
     ScriptFontFamilyMap m_pictographFontFamilyMap;
     float m_textAutosizingFontScaleFactor;
     float m_deviceScaleAdjustment;
     IntSize m_textAutosizingWindowSizeOverride;
@@ skipping 20 matching lines @@
     bool m_compositorDrivenAcceleratedScrollingEnabled : 1;
 
     Timer<Settings> m_setImageLoadingSettingsTimer;
     void imageLoadingSettingsTimerFired(Timer<Settings>*);
     void recalculateTextAutosizingMultipliers();
 };
 
 } // namespace WebCore
 
 #endif // Settings_h