Remove the concept of user stylesheets.

Source/core/page/Settings.cpp

Index: Source/core/page/Settings.cpp
diff --git a/Source/core/page/Settings.cpp b/Source/core/page/Settings.cpp
index 0746f6520b57d071fdbed82d701b2ddd4bb10013..b523868d42c0b455165846b679a1fee3e378a8a7 100644
--- a/Source/core/page/Settings.cpp
+++ b/Source/core/page/Settings.cpp
@@ -356,16 +356,6 @@ void Settings::setPluginsEnabled(bool arePluginsEnabled)
     m_arePluginsEnabled = arePluginsEnabled;
 }
 
-void Settings::setUserStyleSheetLocation(const KURL& userStyleSheetLocation)
-{
-    if (m_userStyleSheetLocation == userStyleSheetLocation)
-        return;
-
-    m_userStyleSheetLocation = userStyleSheetLocation;
-
-    m_page->userStyleSheetLocationChanged();
-}
-
 void Settings::setDNSPrefetchingEnabled(bool dnsPrefetchingEnabled)
 {
     if (m_dnsPrefetchingEnabled == dnsPrefetchingEnabled)