Remove ScopedStyleResolver::treeScopeFor. We only support inline stylesheets or <style scoped> so we can remove this helper. R=ojan@chromium.org Review URL: https://codereview.chromium.org/767013004

diff --git a/sky/engine/core/css/CSSStyleSheet.cpp b/sky/engine/core/css/CSSStyleSheet.cpp
index 24966fe..00dcdcb 100644
--- a/sky/engine/core/css/CSSStyleSheet.cpp
+++ b/sky/engine/core/css/CSSStyleSheet.cpp

@@ -73,11 +73,6 @@
 }
 #endif
 
-PassRefPtr<CSSStyleSheet> CSSStyleSheet::create(PassRefPtr<StyleSheetContents> sheet)
-{
-    return adoptRef(new CSSStyleSheet(sheet));
-}
-
 PassRefPtr<CSSStyleSheet> CSSStyleSheet::createInline(PassRefPtr<StyleSheetContents> sheet, Node* ownerNode, const TextPosition& startPosition)
 {
     ASSERT(sheet);

diff --git a/sky/engine/core/css/CSSStyleSheet.h b/sky/engine/core/css/CSSStyleSheet.h
index ae63dd4..f1ea840 100644
--- a/sky/engine/core/css/CSSStyleSheet.h
+++ b/sky/engine/core/css/CSSStyleSheet.h

@@ -46,7 +46,6 @@
 class CSSStyleSheet final : public StyleSheet {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtr<CSSStyleSheet> create(PassRefPtr<StyleSheetContents>);
     static PassRefPtr<CSSStyleSheet> createInline(Node*, const KURL&, const TextPosition& startPosition = TextPosition::minimumPosition());
     static PassRefPtr<CSSStyleSheet> createInline(PassRefPtr<StyleSheetContents>, Node* ownerNode, const TextPosition& startPosition = TextPosition::minimumPosition());
 

diff --git a/sky/engine/core/css/resolver/ScopedStyleResolver.cpp b/sky/engine/core/css/resolver/ScopedStyleResolver.cpp
index 625d5a9..92d891d 100644
--- a/sky/engine/core/css/resolver/ScopedStyleResolver.cpp
+++ b/sky/engine/core/css/resolver/ScopedStyleResolver.cpp

@@ -39,23 +39,6 @@
 
 namespace blink {
 
-TreeScope* ScopedStyleResolver::treeScopeFor(Document& document, const CSSStyleSheet* sheet)
-{
-    ASSERT(sheet);
-
-    if (!sheet->ownerDocument())
-        return 0;
-
-    Node* ownerNode = sheet->ownerNode();
-    if (!isHTMLStyleElement(ownerNode))
-        return &document;
-
-    HTMLStyleElement& styleElement = toHTMLStyleElement(*ownerNode);
-    if (styleElement.isInShadowTree())
-        return styleElement.containingShadowRoot();
-    return &document;
-}
-
 void ScopedStyleResolver::addRulesFromSheet(CSSStyleSheet* cssSheet, const MediaQueryEvaluator& medium, StyleResolver* resolver)
 {
     m_authorStyleSheets.append(cssSheet);

diff --git a/sky/engine/core/css/resolver/ScopedStyleResolver.h b/sky/engine/core/css/resolver/ScopedStyleResolver.h
index fe668c6..ba24a9c 100644
--- a/sky/engine/core/css/resolver/ScopedStyleResolver.h
+++ b/sky/engine/core/css/resolver/ScopedStyleResolver.h

@@ -51,8 +51,6 @@
         return adoptPtr(new ScopedStyleResolver(scope));
     }
 
-    static TreeScope* treeScopeFor(Document&, const CSSStyleSheet*);
-
     const TreeScope& treeScope() const { return *m_scope; }
 
 public:

diff --git a/sky/engine/core/css/resolver/StyleResolver.cpp b/sky/engine/core/css/resolver/StyleResolver.cpp
index cb9f08a..85b8dd4 100644
--- a/sky/engine/core/css/resolver/StyleResolver.cpp
+++ b/sky/engine/core/css/resolver/StyleResolver.cpp

@@ -166,11 +166,12 @@
     if (cssSheet->mediaQueries() && !m_medium->eval(cssSheet->mediaQueries(), &m_viewportDependentMediaQueryResults))
         return;
 
-    TreeScope* treeScope = ScopedStyleResolver::treeScopeFor(document(), cssSheet);
-    if (!treeScope)
+    Node* ownerNode = cssSheet->ownerNode();
+    if (!ownerNode)
         return;
 
-    ScopedStyleResolver& resolver = treeScope->ensureScopedStyleResolver();
+    TreeScope& treeScope = ownerNode->treeScope();
+    ScopedStyleResolver& resolver = treeScope.ensureScopedStyleResolver();
     document().styleEngine()->addScopedStyleResolver(&resolver);
     resolver.addRulesFromSheet(cssSheet, *m_medium, this);
 }