Merge StyleSheet into CSSStyleSheet.

sky/engine/core/css/StyleSheetList.cpp

Index: sky/engine/core/css/StyleSheetList.cpp
diff --git a/sky/engine/core/css/StyleSheetList.cpp b/sky/engine/core/css/StyleSheetList.cpp
index cd2557b3e80f2df177e756d02c58ea2448184022..bc6a821b1638b4de564f2724c3bc33a67b39bb89 100644
--- a/sky/engine/core/css/StyleSheetList.cpp
+++ b/sky/engine/core/css/StyleSheetList.cpp
@@ -37,7 +37,7 @@ StyleSheetList::~StyleSheetList()
 {
 }
 
-inline const Vector<RefPtr<StyleSheet> >& StyleSheetList::styleSheets()
+inline const Vector<RefPtr<CSSStyleSheet> >& StyleSheetList::styleSheets()
 {
 #if !ENABLE(OILPAN)
     if (!m_treeScope)
@@ -57,9 +57,9 @@ unsigned StyleSheetList::length()
     return styleSheets().size();
 }
 
-StyleSheet* StyleSheetList::item(unsigned index)
+CSSStyleSheet* StyleSheetList::item(unsigned index)
 {
-    const Vector<RefPtr<StyleSheet> >& sheets = styleSheets();
+    const Vector<RefPtr<CSSStyleSheet> >& sheets = styleSheets();
     return index < sheets.size() ? sheets[index].get() : 0;
 }