Remove scoped styles.

Source/core/css/resolver/ScopedStyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 28 matching lines @@
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/html/HTMLStyleElement.h"
 
 namespace WebCore {
 
 ContainerNode* ScopedStyleResolver::scopingNodeFor(Document& document, const CSSStyleSheet* sheet)
 {
     ASSERT(sheet);
 
-    Document* sheetDocument = sheet->ownerDocument();
-    if (!sheetDocument)
-        return 0;

[tasak, 2014/06/03 05:57:48]

I think, this code is not related to style scoped.

I'm not sure whether we can now remove this code or not. In the past,
StyleResolver tried to append stylesheets without document. So this code is just
for filtering out those no-document stylesheets.

It would be better to make another CL if we want to remove the above code?

[kochi, 2014/06/03 07:47:05]

Thanks for the explanation.
I'll separate changes in this file and make another CL.

     Node* ownerNode = sheet->ownerNode();
     if (!isHTMLStyleElement(ownerNode))
         return &document;
 
     HTMLStyleElement& styleElement = toHTMLStyleElement(*ownerNode);
-    if (!styleElement.scoped()) {
-        if (styleElement.isInShadowTree())
-            return styleElement.containingShadowRoot();
-        return &document;
-    }
+    if (styleElement.isInShadowTree())

[tasak, 2014/06/03 05:57:48]

If we keep isScoped method in HTMLStyleElement, it would be better to use
isScoped() here?

[kochi, 2014/06/03 07:47:05]

As I removed isScoepd(), isInShadowTree() is fine here.

+        return styleElement.containingShadowRoot();
 
-    ContainerNode* parent = styleElement.parentNode();
-    if (!parent)
-        return 0;
-
-    return (parent->isElementNode() || parent->isShadowRoot()) ? parent : 0;
+    return &document;
 }
 
 void ScopedStyleResolver::addRulesFromSheet(CSSStyleSheet* cssSheet, const MediaQueryEvaluator& medium, StyleResolver* resolver)
 {
     m_authorStyleSheets.append(cssSheet);
     StyleSheetContents* sheet = cssSheet->contents();
 
     AddRuleFlags addRuleFlags = resolver->document().securityOrigin()->canRequest(sheet->baseURL()) ? RuleHasDocumentSecurityOrigin : RuleHasNoSpecialState;
     const RuleSet& ruleSet = sheet->ensureRuleSet(medium, addRuleFlags);
     resolver->addMediaQueryResults(ruleSet.viewportDependentMediaQueryResults());
@@ skipping 71 matching lines @@
 
 void ScopedStyleResolver::collectViewportRulesTo(StyleResolver* resolver) const
 {
     if (!m_scopingNode.isDocumentNode())
         return;
     for (size_t i = 0; i < m_authorStyleSheets.size(); ++i)
         resolver->viewportStyleResolver()->collectViewportRules(&m_authorStyleSheets[i]->contents()->ruleSet(), ViewportStyleResolver::AuthorOrigin);
 }
 
 } // namespace WebCore