Implement headers attributes in ForeignFetchResponse

content/child/web_url_loader_impl.cc

Index: content/child/web_url_loader_impl.cc
diff --git a/content/child/web_url_loader_impl.cc b/content/child/web_url_loader_impl.cc
index cf47c4fedca531c858a37319a37e9ef28da01743..56921108fc991a138215062a62483655452304b6 100644
--- a/content/child/web_url_loader_impl.cc
+++ b/content/child/web_url_loader_impl.cc
@@ -955,6 +955,13 @@ void WebURLLoaderImpl::PopulateURLResponse(const GURL& url,
       info.is_in_cache_storage
           ? blink::WebString::fromUTF8(info.cache_storage_cache_name)
           : blink::WebString());
+  blink::WebVector<blink::WebString> cors_exposed_header_names(
+      info.cors_exposed_header_names.size());
+  std::transform(
+      info.cors_exposed_header_names.begin(),
+      info.cors_exposed_header_names.end(), cors_exposed_header_names.begin(),
+      [](const std::string& h) { return blink::WebString::fromLatin1(h); });
+  response->setCorsExposedHeaderNames(cors_exposed_header_names);
 
   SetSecurityStyleAndDetails(url, info.security_info, response,
                              report_security_info);