Move preferred stylesheet set out of active sheet update.

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

Index: third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp b/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
index f628f932a3883f5b228bbe351888686e5096ee67..6c12df483749860c9894655395d77cfb4110b890 100644
--- a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
@@ -661,6 +661,10 @@ void LinkStyle::process()
 
         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()) {