Have CSSParserContext take a Document reference in argument

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 1841 matching lines @@
     memoryCache()->evictResources();
 }
 
 void Internals::allowRoundingHacks() const
 {
     TextRun::setAllowsRoundingHacks(true);
 }
 
 void Internals::insertAuthorCSS(Document* document, const String& css) const
 {
-    RefPtr<StyleSheetContents> parsedSheet = StyleSheetContents::create(document);
+    if (!document)
+        return;
+
+    RefPtr<StyleSheetContents> parsedSheet = StyleSheetContents::create(*document);
     parsedSheet->setIsUserStyleSheet(false);
     parsedSheet->parseString(css);
     document->styleSheetCollections()->addAuthorSheet(parsedSheet);
 }
 
 void Internals::insertUserCSS(Document* document, const String& css) const
 {
-    RefPtr<StyleSheetContents> parsedSheet = StyleSheetContents::create(document);
+    if (!document)
+        return;
+
+    RefPtr<StyleSheetContents> parsedSheet = StyleSheetContents::create(*document);
     parsedSheet->setIsUserStyleSheet(true);
     parsedSheet->parseString(css);
     document->styleSheetCollections()->addUserSheet(parsedSheet);
 }
 
 String Internals::counterValue(Element* element)
 {
     if (!element)
         return String();
 
@@ skipping 324 matching lines @@
         return false;
     sharedContext->getExtensions()->loseContextCHROMIUM(Extensions3D::GUILTY_CONTEXT_RESET_ARB, Extensions3D::INNOCENT_CONTEXT_RESET_ARB);
     // To prevent tests that call loseSharedGraphicsContext3D from being
     // flaky, we call finish so that the context is guaranteed to be lost
     // synchronously (i.e. before returning).
     sharedContext->finish();
     return true;
 }
 
 }