Make style independent of the presence of the <shadow> element.

Source/core/dom/shadow/ShadowRoot.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 153 matching lines @@
             if (child->renderer())
                 lastTextNode = 0;
         }
     }
 
     styleResolver.popParentShadowRoot(*this);
 
     clearChildNeedsStyleRecalc();
 }
 
-bool ShadowRoot::isActiveForStyling() const
-{
-    if (!youngerShadowRoot())
-        return true;
-
-    if (InsertionPoint* point = shadowInsertionPointOfYoungerShadowRoot()) {
-        if (point->containingShadowRoot())
-            return true;
-    }
-    return false;
-}
-
 void ShadowRoot::setApplyAuthorStyles(bool value)
 {
     if (isOrphan())
         return;
 
     if (applyAuthorStyles() == value)
         return;
 
     m_applyAuthorStyles = value;
-    if (!isActiveForStyling())
-        return;
 
     ASSERT(host());
     ASSERT(host()->shadow());
     if (host()->shadow()->didAffectApplyAuthorStyles())
         host()->setNeedsStyleRecalc(SubtreeStyleChange);
 
     // Since styles in shadow trees can select shadow hosts, set shadow host's needs-recalc flag true.
     // FIXME: host->setNeedsStyleRecalc() should take care of all elements in its shadow tree.
     // However, when host's recalcStyle is skipped (i.e. host's parent has no renderer),
     // no recalc style is invoked for any elements in its shadow tree.
@@ skipping 169 matching lines @@
 
 StyleSheetList* ShadowRoot::styleSheets()
 {
     if (!ensureShadowRootRareData()->styleSheets())
         m_shadowRootRareData->setStyleSheets(StyleSheetList::create(this));
 
     return m_shadowRootRareData->styleSheets();
 }
 
 }