Move preferred stylesheet set out of active sheet update.

third_party/WebKit/Source/core/html/HTMLLinkElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Rob Buis (rwlbuis@gmail.com)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 643 matching lines @@
             removePendingSheet();
             clearResource();
             clearFetchFollowingCORS();
         }
 
         if (!m_owner->shouldLoadLink())
             return;
 
         m_loading = true;
 
+        String title = m_owner->title();
+        if (!title.isEmpty() && !m_owner->isAlternate() && m_disabledState != EnabledViaScript)
+            document().styleEngine().setPreferredStylesheetSetNameIfNotSet(title);
+
         bool mediaQueryMatches = true;
         LocalFrame* frame = loadingFrame();
         if (!m_owner->media().isEmpty() && frame && frame->document()) {
             RefPtr<ComputedStyle> documentStyle = StyleResolver::styleForDocument(*frame->document());
             MediaQuerySet* media = MediaQuerySet::create(m_owner->media());
             MediaQueryEvaluator evaluator(frame);
             mediaQueryMatches = evaluator.eval(media);
         }
 
         // Don't hold up layout tree construction and script execution on stylesheets
@@ skipping 44 matching lines @@
 }
 
 DEFINE_TRACE(LinkStyle)
 {
     visitor->trace(m_sheet);
     LinkResource::trace(visitor);
     ResourceOwner<StyleSheetResource>::trace(visitor);
 }
 
 } // namespace blink