[ServiceWorker] Add wasFetchedViaServiceWorker flag to WebURLResponse and ResourceResponse.

Source/core/loader/DocumentThreadableLoader.cpp

Index: Source/core/loader/DocumentThreadableLoader.cpp
diff --git a/Source/core/loader/DocumentThreadableLoader.cpp b/Source/core/loader/DocumentThreadableLoader.cpp
index 399b8fbd253668283a6cf51a3da5e16bcc3e09e8..bcb00b9b67766a00380e91cad3274af94fc719e0 100644
--- a/Source/core/loader/DocumentThreadableLoader.cpp
+++ b/Source/core/loader/DocumentThreadableLoader.cpp
@@ -319,6 +319,8 @@ void DocumentThreadableLoader::handleResponse(unsigned long identifier, const Re
         return;
     }
 
+    // FIXME: When response.wasFetchedViaServiceWorker() is true, we need to check the URL of the response for CSP and CORS.
+
     if (!m_sameOriginRequest && m_options.crossOriginRequestPolicy == UseAccessControl) {
         String accessControlErrorDescription;
         if (!passesAccessControlCheck(response, effectiveAllowCredentials(), securityOrigin(), accessControlErrorDescription)) {