[ServiceWorker] Fetch event should return integrity value

third_party/WebKit/Source/core/html/LinkStyle.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/html/LinkStyle.h"
 
 #include "core/HTMLNames.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 334 matching lines @@
     params.SetCrossOriginAccessControl(GetDocument().GetSecurityOrigin(),
                                        cross_origin);
     SetFetchFollowingCORS();
   }
 
   String integrity_attr = owner_->FastGetAttribute(integrityAttr);
   if (!integrity_attr.IsEmpty()) {
     IntegrityMetadataSet metadata_set;
     SubresourceIntegrity::ParseIntegrityAttribute(integrity_attr, metadata_set);
     params.SetIntegrityMetadata(metadata_set);
+    params.MutableResourceRequest().SetFetchIntegrity(integrity_attr);
   }
   SetResource(CSSStyleSheetResource::Fetch(params, GetDocument().Fetcher()));
 
   if (loading_ && !GetResource()) {
     // The request may have been denied if (for example) the stylesheet is
     // local and the document is remote, or if there was a Content Security
     // Policy Failure.  setCSSStyleSheet() can be called synchronuosly in
     // setResource() and thus resource() is null and |m_loading| is false in
     // such cases even if the request succeeds.
     loading_ = false;
@@ skipping 61 matching lines @@
     ClearSheet();
 }
 
 DEFINE_TRACE(LinkStyle) {
   visitor->Trace(sheet_);
   LinkResource::Trace(visitor);
   ResourceOwner<StyleSheetResource>::Trace(visitor);
 }
 
 }  // namespace blink