Don't use SVG resource documents with an unrecognized MIME-type

third_party/WebKit/Source/core/fetch/DocumentResource.h

 /*
     Copyright (C) 2010 Rob Buis <rwlbuis@gmail.com>
     Copyright (C) 2011 Cosmin Truta <ctruta@gmail.com>
     Copyright (C) 2012 University of Szeged
     Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
 
     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 42 matching lines @@
         SVGDocumentResourceFactory()
             : ResourceFactory(Resource::SVGDocument) { }
 
         PassRefPtrWillBeRawPtr<Resource> create(const ResourceRequest& request, const String& charset) const override
         {
             return adoptRefWillBeNoop(new DocumentResource(request, Resource::SVGDocument));
         }
     };
     DocumentResource(const ResourceRequest&, Type);
 
+    bool mimeTypeAllowed() const;
     PassRefPtrWillBeRawPtr<Document> createDocument(const KURL&);
 
     RefPtrWillBeMember<Document> m_document;
     OwnPtr<TextResourceDecoder> m_decoder;
 };
 
 DEFINE_TYPE_CASTS(DocumentResource, Resource, resource, resource->type() == Resource::SVGDocument, resource.type() == Resource::SVGDocument); \
 inline DocumentResource* toDocumentResource(const RefPtrWillBeRawPtr<Resource>& ptr) { return toDocumentResource(ptr.get()); }
 
 class DocumentResourceClient : public ResourceClient {
 public:
     ~DocumentResourceClient() override {}
     static bool isExpectedType(ResourceClient* client) { return client->resourceClientType() == DocumentType; }
     ResourceClientType resourceClientType() const final { return DocumentType; }
 };
 
 } // namespace blink
 
 #endif // DocumentResource_h