Revert of Cache SubResourceIntegrity checks at Resource

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 39 matching lines @@
   return resource;
 }
 
 ScriptResource::ScriptResource(const ResourceRequest& resourceRequest,
                                const ResourceLoaderOptions& options,
                                const String& charset)
     : TextResource(resourceRequest,
                    Script,
                    options,
                    "application/javascript",
-                   charset) {}
+                   charset),
+      m_integrityDisposition(ScriptIntegrityDisposition::NotChecked) {}
 
 ScriptResource::~ScriptResource() {}
 
 void ScriptResource::didAddClient(ResourceClient* client) {
   DCHECK(ScriptResourceClient::isExpectedType(client));
   Resource::didAddClient(client);
 }
 
 void ScriptResource::appendData(const char* data, size_t length) {
   Resource::appendData(data, length);
@@ skipping 33 matching lines @@
 void ScriptResource::destroyDecodedDataForFailedRevalidation() {
   m_script = AtomicString();
 }
 
 bool ScriptResource::mimeTypeAllowedByNosniff() const {
   return parseContentTypeOptionsHeader(response().httpHeaderField(
              HTTPNames::X_Content_Type_Options)) != ContentTypeOptionsNosniff ||
          MIMETypeRegistry::isSupportedJavaScriptMIMEType(httpContentType());
 }
 
+void ScriptResource::setIntegrityDisposition(
+    ScriptIntegrityDisposition disposition) {
+  DCHECK_NE(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