Read the default min-width value from the UA style sheets

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 32 matching lines @@
 #include "core/dom/TextLinkColors.h"
 #include "core/dom/TreeScope.h"
 #include "core/dom/UserActionElementSet.h"
 #include "core/dom/ViewportDescription.h"
 #include "core/dom/custom/CustomElement.h"
 #include "core/html/CollectionType.h"
 #include "core/page/FocusType.h"
 #include "core/page/PageVisibilityState.h"
 #include "core/rendering/HitTestRequest.h"
 #include "heap/Handle.h"
+#include "platform/Length.h"
 #include "platform/Timer.h"
 #include "platform/weborigin/KURL.h"
 #include "platform/weborigin/ReferrerPolicy.h"
 #include "wtf/HashSet.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/WeakPtr.h"
 
 namespace WebCore {
@@ skipping 212 matching lines @@
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitfullscreenchange);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitfullscreenerror);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitpointerlockchange);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitpointerlockerror);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(wheel);
 
     bool shouldMergeWithLegacyDescription(ViewportDescription::Type);
     bool shouldOverrideLegacyDescription(ViewportDescription::Type);
     void setViewportDescription(const ViewportDescription&);
     const ViewportDescription& viewportDescription() const { return m_viewportDescription; }
+    Length viewportDefaultMinWidth() const { return m_viewportDefaultMinWidth; }
+
 #ifndef NDEBUG
     bool didDispatchViewportPropertiesChanged() const { return m_didDispatchViewportPropertiesChanged; }
 #endif
     bool hasLegacyViewportTag() const { return m_legacyViewportDescription.isLegacyViewportType(); }
 
     void setReferrerPolicy(ReferrerPolicy);
     ReferrerPolicy referrerPolicy() const { return m_referrerPolicy; }
 
     String outgoingReferrer();
     String outgoingOrigin() const;
@@ skipping 1007 matching lines @@
     bool m_hasFullscreenElementStack; // For early return in FullscreenElementStack::fromIfExists()
 
     Vector<RefPtr<Element> > m_topLayerElements;
 
     int m_loadEventDelayCount;
     Timer<Document> m_loadEventDelayTimer;
     Timer<Document> m_pluginLoadingTimer;
 
     ViewportDescription m_viewportDescription;
     ViewportDescription m_legacyViewportDescription;
+    Length m_viewportDefaultMinWidth;
 
     bool m_didSetReferrerPolicy;
     ReferrerPolicy m_referrerPolicy;
 
     bool m_directionSetOnDocumentElement;
     bool m_writingModeSetOnDocumentElement;
     DocumentTiming m_documentTiming;
     RefPtrWillBePersistent<MediaQueryMatcher> m_mediaQueryMatcher;
     bool m_writeRecursionIsTooDeep;
     unsigned m_writeRecursionDepth;
@@ skipping 85 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h