Delete StyleSheetList and support code.

sky/engine/core/dom/StyleSheetCollection.cpp

Index: sky/engine/core/dom/StyleSheetCollection.cpp
diff --git a/sky/engine/core/dom/StyleSheetCollection.cpp b/sky/engine/core/dom/StyleSheetCollection.cpp
index 2c241d9b282986e9ebf40527f3873110cd3e0cba..8a864d908e05469b02a7d8f5b7b09438c6686c9d 100644
--- a/sky/engine/core/dom/StyleSheetCollection.cpp
+++ b/sky/engine/core/dom/StyleSheetCollection.cpp
@@ -41,17 +41,9 @@ StyleSheetCollection::~StyleSheetCollection()
 
 void StyleSheetCollection::swap(StyleSheetCollection& other)
 {
-    m_styleSheetsForStyleSheetList.swap(other.m_styleSheetsForStyleSheetList);
     m_activeAuthorStyleSheets.swap(other.m_activeAuthorStyleSheets);
 }
 
-void StyleSheetCollection::swapSheetsForSheetList(Vector<RefPtr<CSSStyleSheet> >& sheets)
-{
-    // Only called for collection of HTML Imports that never has active sheets.
-    ASSERT(m_activeAuthorStyleSheets.isEmpty());
-    m_styleSheetsForStyleSheetList.swap(sheets);
-}
-
 void StyleSheetCollection::appendActiveStyleSheets(const Vector<RefPtr<CSSStyleSheet> >& sheets)
 {
     m_activeAuthorStyleSheets.appendVector(sheets);
@@ -62,9 +54,4 @@ void StyleSheetCollection::appendActiveStyleSheet(CSSStyleSheet* sheet)
     m_activeAuthorStyleSheets.append(sheet);
 }
 
-void StyleSheetCollection::appendSheetForList(CSSStyleSheet* sheet)
-{
-    m_styleSheetsForStyleSheetList.append(sheet);
-}
-
 }