Deprecate fetching stylesheets with unsupported type

third_party/WebKit/Source/core/html/HTMLLinkElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 59 matching lines @@
     DECLARE_VIRTUAL_TRACE();
 
     void startLoadingDynamicSheet();
     void notifyLoadedSheetAndAllCriticalSubresources(Node::LoadedSheetErrorStatus);
     bool sheetLoaded();
 
     void setDisabledState(bool);
     void setSheetTitle(const String&);
 
     bool styleSheetIsLoading() const;
+    bool styleSheetTypeIsSupported(const String& type) const;
     bool hasSheet() const { return m_sheet; }
     bool isDisabled() const { return m_disabledState == Disabled; }
     bool isEnabledViaScript() const { return m_disabledState == EnabledViaScript; }
     bool isUnset() const { return m_disabledState == Unset; }
 
     CSSStyleSheet* sheet() const { return m_sheet.get(); }
 
 private:
     // From StyleSheetResourceClient
     void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource*) override;
@@ skipping 134 matching lines @@
     Vector<IntSize> m_iconSizes;
     LinkRelAttribute m_relAttribute;
 
     bool m_createdByParser;
     bool m_isInShadowTree;
 };
 
 } // namespace blink
 
 #endif // HTMLLinkElement_h