Avoid sending mixed-content requests for ImageSet contexts

third_party/WebKit/Source/core/html/parser/PreloadRequest.cpp

 // Copyright 2015 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/parser/PreloadRequest.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/DocumentWriteIntervention.h"
 #include "core/loader/DocumentLoader.h"
 #include "platform/CrossOriginAttributeValue.h"
@@ skipping 27 matching lines @@
   const KURL& url = CompleteURL(document);
   // Data URLs are filtered out in the preload scanner.
   DCHECK(!url.ProtocolIsData());
 
   ResourceRequest resource_request(url);
   resource_request.SetHTTPReferrer(SecurityPolicy::GenerateReferrer(
       referrer_policy_, url,
       referrer_source_ == kBaseUrlIsReferrer
           ? base_url_.StrippedForUseAsReferrer()
           : document->OutgoingReferrer()));
-  resource_request.SetRequestContext(
-      ResourceFetcher::DetermineRequestContext(resource_type_, false));
+  resource_request.SetRequestContext(ResourceFetcher::DetermineRequestContext(
+      resource_type_, is_image_set_, false));
 
   if (resource_type_ == Resource::kScript)
     MaybeDisallowFetchForDocWrittenScript(resource_request, defer_, *document);
 
   FetchParameters params(resource_request, initiator_info);
 
   if (resource_type_ == Resource::kImportResource) {
     SecurityOrigin* security_origin =
         document->ContextDocument()->GetSecurityOrigin();
     params.SetCrossOriginAccessControl(security_origin,
@@ skipping 26 matching lines @@
   if (from_insertion_scanner_) {
     speculative_preload_type =
         FetchParameters::SpeculativePreloadType::kInserted;
   }
   params.SetSpeculativePreloadType(speculative_preload_type, discovery_time_);
 
   return document->Loader()->StartPreload(resource_type_, params);
 }
 
 }  // namespace blink