Revalidate using the same Resource, attempt #3

third_party/WebKit/Source/core/fetch/ScriptResource.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple 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
@@ skipping 77 matching lines @@
         // We lie a it here and claim that script counts as encoded data (even though it's really decoded data).
         // That's because the MemoryCache thinks that it can clear out decoded data by calling destroyDecodedData(),
         // but we can't destroy script in destroyDecodedData because that's our only copy of the data!
         setEncodedSize(script.sizeInBytes());
         m_script = AtomicString(script);
     }
 
     return m_script.string();
 }
 
+void ScriptResource::destroyDecodedDataForFailedRevalidation()
+{
+    m_script = AtomicString();
+}
+
 bool ScriptResource::mimeTypeAllowedByNosniff() const
 {
     return parseContentTypeOptionsHeader(m_response.httpHeaderField("X-Content-Type-Options")) != ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType());
 }
 
 bool ScriptResource::mustRefetchDueToIntegrityMetadata(const FetchRequest& request) const
 {
     if (!m_integrityChecked || request.integrityMetadata().isEmpty())
         return false;
 
     // TODO(jww) this integrity metadata should actually be
     // normalized so that order doesn't matter.
     return m_integrityMetadata != request.integrityMetadata();
 }
 
 } // namespace blink