Move preferred stylesheet set out of active sheet update.

third_party/WebKit/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 42 matching lines @@
             Document* document = candidate.importedDocument();
             if (!document)
                 continue;
             if (collector.hasVisited(document))
                 continue;
             collector.willVisit(document);
             document->styleEngine().updateStyleSheetsInImport(collector);
             continue;
         }
 
-        if (candidate.isEnabledAndLoading()) {
-            // it is loading but we should still decide which style sheet set to use
-            if (candidate.hasPreferrableName())
-                engine.setPreferredStylesheetSetNameIfNotSet(candidate.title());
+        if (candidate.isEnabledAndLoading())
             continue;
-        }
 
         StyleSheet* sheet = candidate.sheet();
         if (!sheet)
             continue;
 
-        if (candidate.hasPreferrableName())
-            engine.setPreferredStylesheetSetNameIfNotSet(candidate.title());
         collector.appendSheetForList(sheet);
         if (candidate.canBeActivated(engine.preferredStylesheetSetName()))
             collector.appendActiveStyleSheet(toCSSStyleSheet(sheet));
     }
 }
 
 void DocumentStyleSheetCollection::collectStyleSheets(StyleEngine& engine, DocumentStyleSheetCollector& collector)
 {
     DCHECK_EQ(&document().styleEngine(), &engine);
     collector.appendActiveStyleSheets(engine.injectedAuthorStyleSheets());
@@ skipping 34 matching lines @@
     collection.swap(*this);
 }
 
 DEFINE_TRACE_WRAPPERS(DocumentStyleSheetCollection)
 {
     for (auto sheet : m_styleSheetsForStyleSheetList) {
         visitor->traceWrappers(sheet);
     }
 }
 } // namespace blink