Remove iframe@seamless

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1536 matching lines @@
 
         // The style recalc could have caused the styled node to be discarded or replaced
         // if it was a PseudoElement so we need to update it.
         styledNode = this->styledNode();
         renderer = styledNode->renderer();
 
         style = computeRenderStyle(propertyID);
 
         bool forceFullLayout = isLayoutDependent(propertyID, style, renderer)
             || styledNode->isInShadowTree()
-            || (document.ownerElement() && document.ensureStyleResolver().hasViewportDependentMediaQueries())
-            || document.seamlessParentIFrame();
+            || (document.ownerElement() && document.ensureStyleResolver().hasViewportDependentMediaQueries());
 
         if (forceFullLayout) {
             document.updateLayoutIgnorePendingStylesheets();
             styledNode = this->styledNode();
             style = computeRenderStyle(propertyID);
             renderer = styledNode->renderer();
         }
     } else {
         style = computeRenderStyle(propertyID);
     }
@@ skipping 1578 matching lines @@
     static const CSSPropertyID propertiesAfterSlashSeperator[3] = { CSSPropertyBackgroundSize, CSSPropertyBackgroundOrigin,
                                                                     CSSPropertyBackgroundClip };
 
     RefPtr<CSSValueList> list = CSSValueList::createSlashSeparated();
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesBeforeSlashSeperator, WTF_ARRAY_LENGTH(propertiesBeforeSlashSeperator))));
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesAfterSlashSeperator, WTF_ARRAY_LENGTH(propertiesAfterSlashSeperator))));
     return list.release();
 }
 
 } // namespace WebCore