Implement script MIME restrictions for X-Content-Type-Options: nosniff for Workers

third_party/WebKit/Source/platform/loader/fetch/Resource.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, 2009, 2010, 2011 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
@@ skipping 415 matching lines @@
 void Resource::finish(double loadFinishTime) {
   DCHECK(!m_isRevalidating);
   m_loadFinishTime = loadFinishTime;
   if (!errorOccurred())
     m_status = ResourceStatus::Cached;
   m_loader = nullptr;
   checkNotify();
 }
 
 AtomicString Resource::httpContentType() const {
-  return extractMIMETypeFromMediaType(
-      response().httpHeaderField(HTTPNames::Content_Type).lower());
+  return response().httpContentType();
 }
 
 bool Resource::passesAccessControlCheck(SecurityOrigin* securityOrigin) const {
   StoredCredentials storedCredentials =
       lastResourceRequest().allowStoredCredentials()
           ? AllowStoredCredentials
           : DoNotAllowStoredCredentials;
   CrossOriginAccessControl::AccessStatus status =
       CrossOriginAccessControl::checkAccess(response(), storedCredentials,
                                             securityOrigin);
@@ skipping 675 matching lines @@
     case Resource::Media:
     case Resource::Manifest:
     case Resource::Mock:
       return false;
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace blink