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

third_party/WebKit/Source/platform/network/ResourceResponse.cpp

Index: third_party/WebKit/Source/platform/network/ResourceResponse.cpp
diff --git a/third_party/WebKit/Source/platform/network/ResourceResponse.cpp b/third_party/WebKit/Source/platform/network/ResourceResponse.cpp
index 79b9a01b33defeb70725e1d289a458253c18b3f8..e55514d3341bc7788b45201f612c9aea2ebc8e9c 100644
--- a/third_party/WebKit/Source/platform/network/ResourceResponse.cpp
+++ b/third_party/WebKit/Source/platform/network/ResourceResponse.cpp
@@ -27,6 +27,7 @@
 #include "platform/network/ResourceResponse.h"
 
 #include "platform/HTTPNames.h"
+#include "platform/network/HTTPParsers.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/StdLibExtras.h"
@@ -538,6 +539,11 @@ bool ResourceResponse::isAttachment() const {
   return equalIgnoringCase(value, attachmentString);
 }
 
+AtomicString ResourceResponse::httpContentType() const {
+  return extractMIMETypeFromMediaType(
+      httpHeaderField(HTTPNames::Content_Type).lower());
+}
+
 void ResourceResponse::setLastModifiedDate(time_t lastModifiedDate) {
   m_lastModifiedDate = lastModifiedDate;
 }