Remove iframe@seamless

Source/core/dom/DocumentStyleSheetCollection.cpp

 /*
  * 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) 2013 Google Inc. All rights reserved.
  *
@@ skipping 86 matching lines @@
             continue;
 
         if (candidate.hasPreferrableName(engine->preferredStylesheetSetName()))
             engine->selectStylesheetSetName(candidate.title());
         collector.appendSheetForList(sheet);
         if (candidate.canBeActivated(engine->preferredStylesheetSetName()))
             collector.appendActiveStyleSheet(toCSSStyleSheet(sheet));
     }
 }
 
-static void collectActiveCSSStyleSheetsFromSeamlessParents(DocumentStyleSheetCollector& collector, Document* document)
-{
-    HTMLIFrameElement* seamlessParentIFrame = document->seamlessParentIFrame();
-    if (!seamlessParentIFrame)
-        return;
-    collector.appendActiveStyleSheets(seamlessParentIFrame->document().styleEngine()->activeAuthorStyleSheets());
-}
-
 void DocumentStyleSheetCollection::collectStyleSheets(StyleEngine* engine, DocumentStyleSheetCollector& collector)
 {
     ASSERT(document()->styleEngine() == engine);
     collector.appendActiveStyleSheets(engine->injectedAuthorStyleSheets());
     collector.appendActiveStyleSheets(engine->documentAuthorStyleSheets());
-    collectActiveCSSStyleSheetsFromSeamlessParents(collector, document());
     collectStyleSheetsFromCandidates(engine, collector);
 }
 
 bool DocumentStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine, StyleResolverUpdateMode updateMode)
 {
     StyleSheetCollectionBase collection;
     ActiveDocumentStyleSheetCollector collector(collection);
     collectStyleSheets(engine, collector);
 
     StyleSheetChange change;
@@ skipping 22 matching lines @@
     m_scopingNodesForStyleScoped.didRemoveScopingNodes();
 
     collection.swap(*this);
 
     updateUsesRemUnits();
 
     return change.requiresFullStyleRecalc;
 }
 
 }