Use TreeScope::completeURL and baseURL instead of the Document versions

Source/core/css/CSSParserMode.h

Index: Source/core/css/CSSParserMode.h
diff --git a/Source/core/css/CSSParserMode.h b/Source/core/css/CSSParserMode.h
index 36084b87af86a946533d1d9df85d15bfc0f3b7ef..0c93de7ab0b03d2cbc9cf23e6d05cfe7b630f893 100644
--- a/Source/core/css/CSSParserMode.h
+++ b/Source/core/css/CSSParserMode.h
@@ -35,7 +35,7 @@
 
 namespace WebCore {
 
-class Document;
+class TreeScope;
 
 // Must not grow beyond 3 bits, due to packing in StylePropertySet.
 enum CSSParserMode {
@@ -92,7 +92,7 @@ class CSSParserContext {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     CSSParserContext(CSSParserMode);
-    CSSParserContext(const Document&, const KURL& baseURL = KURL(), const String& charset = emptyString());
+    CSSParserContext(const TreeScope&, const KURL& baseURL = KURL(), const String& charset = emptyString());
 
     bool operator==(const CSSParserContext&) const;
     bool operator!=(const CSSParserContext& other) const { return !(*this == other); }