Always Reconstruct when stylesheets change.

sky/engine/core/dom/ShadowTreeStyleSheetCollection.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 40 matching lines @@
             continue;
 
         StyleSheet* sheet = toHTMLStyleElement(node)->sheet();
         if (sheet)
             collection.appendSheetForList(sheet);
         if (sheet && sheet->isCSSStyleSheet())
             collection.appendActiveStyleSheet(toCSSStyleSheet(sheet));
     }
 }
 
-void ShadowTreeStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine, StyleResolverUpdateMode updateMode)
+void ShadowTreeStyleSheetCollection::updateActiveStyleSheets(StyleEngine* engine)
 {
     StyleSheetCollection collection;
     collectStyleSheets(engine, collection);
 
-    StyleSheetChange change;
-    analyzeStyleSheetChange(updateMode, collection, change);
+    if (StyleResolver* styleResolver = engine->resolver()) {
+        // We should not destroy StyleResolver when we find any stylesheet update in a shadow tree.
+        // In this case, we will reset rulesets created from style elements in the shadow tree.
+        styleResolver->resetAuthorStyle(treeScope());
+        styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets);
+        styleResolver->lazyAppendAuthorStyleSheets(0, collection.activeAuthorStyleSheets());
+    }
 
-    if (StyleResolver* styleResolver = engine->resolver()) {
-        if (change.styleResolverUpdateType != Additive) {
-            // We should not destroy StyleResolver when we find any stylesheet update in a shadow tree.
-            // In this case, we will reset rulesets created from style elements in the shadow tree.
-            styleResolver->resetAuthorStyle(treeScope());
-            styleResolver->removePendingAuthorStyleSheets(m_activeAuthorStyleSheets);
-            styleResolver->lazyAppendAuthorStyleSheets(0, collection.activeAuthorStyleSheets());
-        } else {
-            styleResolver->lazyAppendAuthorStyleSheets(m_activeAuthorStyleSheets.size(), collection.activeAuthorStyleSheets());
-        }
-    }
-    if (change.requiresFullStyleRecalc)
-        toShadowRoot(treeScope().rootNode()).host()->setNeedsStyleRecalc(SubtreeStyleChange);
+    toShadowRoot(treeScope().rootNode()).host()->setNeedsStyleRecalc(SubtreeStyleChange);
 
     collection.swap(*this);
     updateUsesRemUnits();
 }
 
 }