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

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 14 matching lines @@
 */
 
 #include "core/fetch/ScriptResource.h"
 
 #include "core/fetch/FetchRequest.h"
 #include "core/fetch/IntegrityMetadata.h"
 #include "core/fetch/ResourceClientWalker.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/SharedBuffer.h"
-#include "platform/network/HTTPParsers.h"
 #include "public/platform/WebProcessMemoryDump.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<ScriptResource> ScriptResource::fetch(FetchRequest& request, ResourceFetcher* fetcher)
 {
     ASSERT(request.resourceRequest().frameType() == WebURLRequest::FrameTypeNone);
     request.mutableResourceRequest().setRequestContext(WebURLRequest::RequestContextScript);
     RefPtrWillBeRawPtr<ScriptResource> resource = toScriptResource(fetcher->requestResource(request, ScriptResourceFactory()));
     if (resource && !request.integrityMetadata().isEmpty())
@@ skipping 32 matching lines @@
 
 void ScriptResource::onMemoryDump(WebMemoryDumpLevelOfDetail levelOfDetail, WebProcessMemoryDump* memoryDump) const
 {
     Resource::onMemoryDump(levelOfDetail, memoryDump);
     const String name = getMemoryDumpName() + "/decoded_script";
     auto dump = memoryDump->createMemoryAllocatorDump(name);
     dump->addScalar("size", "bytes", m_script.currentSizeInBytes());
     memoryDump->addSuballocation(dump->guid(), String(WTF::Partitions::kAllocatedObjectPoolName));
 }
 
-AtomicString ScriptResource::mimeType() const
-{
-    return extractMIMETypeFromMediaType(m_response.httpHeaderField(HTTPNames::Content_Type)).lower();
-}
-
 const CompressibleString& ScriptResource::script()
 {
     ASSERT(!isPurgeable());
     ASSERT(isLoaded());
 
     if (m_script.isNull() && m_data) {
         String script = decodedText();
         m_data.clear();
         // 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 = CompressibleString(script.impl());
     }
 
     return m_script;
 }
 
 void ScriptResource::destroyDecodedDataForFailedRevalidation()
 {
     m_script = CompressibleString();
 }
 
 bool ScriptResource::mimeTypeAllowedByNosniff() const
 {
-    return parseContentTypeOptionsHeader(m_response.httpHeaderField(HTTPNames::X_Content_Type_Options)) != ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType());
+    return parseContentTypeOptionsHeader(m_response.httpHeaderField(HTTPNames::X_Content_Type_Options)) != ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(httpContentType());
 }
 
 void ScriptResource::setIntegrityDisposition(ScriptIntegrityDisposition disposition)
 {
     ASSERT(disposition != ScriptIntegrityDisposition::NotChecked);
     m_integrityDisposition = disposition;
 }
 bool ScriptResource::mustRefetchDueToIntegrityMetadata(const FetchRequest& request) const
 {
     if (request.integrityMetadata().isEmpty())
         return false;
 
     return !IntegrityMetadata::setsEqual(m_integrityMetadata, request.integrityMetadata());
 }
 
 } // namespace blink