Remove scoped styles.

Source/core/css/resolver/ScopedStyleResolver.cpp

Index: Source/core/css/resolver/ScopedStyleResolver.cpp
diff --git a/Source/core/css/resolver/ScopedStyleResolver.cpp b/Source/core/css/resolver/ScopedStyleResolver.cpp
index 3190423c3475c843f8b945b41a9dc98ec57d7d73..ff52d8e89a5db3054c940b190359c642920a256c 100644
--- a/Source/core/css/resolver/ScopedStyleResolver.cpp
+++ b/Source/core/css/resolver/ScopedStyleResolver.cpp
@@ -46,25 +46,15 @@ ContainerNode* ScopedStyleResolver::scopingNodeFor(Document& document, const CSS
 {
     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;
-    }
-
-    ContainerNode* parent = styleElement.parentNode();
-    if (!parent)
-        return 0;
+    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();
 
-    return (parent->isElementNode() || parent->isShadowRoot()) ? parent : 0;
+    return &document;
 }
 
 void ScopedStyleResolver::addRulesFromSheet(CSSStyleSheet* cssSheet, const MediaQueryEvaluator& medium, StyleResolver* resolver)