Teach URLRequest about initiator checks for First-Party-Only cookies.

content/browser/appcache/appcache_update_job.cc

Index: content/browser/appcache/appcache_update_job.cc
diff --git a/content/browser/appcache/appcache_update_job.cc b/content/browser/appcache/appcache_update_job.cc
index 8720fe78e718bfebcbf506aec28fe15a5691530d..6ad2cadc9a836ce33d68b09eab507cc3d3295ffc 100644
--- a/content/browser/appcache/appcache_update_job.cc
+++ b/content/browser/appcache/appcache_update_job.cc
@@ -20,6 +20,7 @@
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request_context.h"
+#include "url/origin.h"
 
 namespace content {
 
@@ -163,6 +164,7 @@ AppCacheUpdateJob::URLFetcher::~URLFetcher() {
 
 void AppCacheUpdateJob::URLFetcher::Start() {
   request_->set_first_party_for_cookies(job_->manifest_url_);
+  request_->set_initiator(url::Origin(job_->manifest_url_));

[michaeln, 2015/10/23 23:29:50]

appcache lgtm

   if (fetch_type_ == MANIFEST_FETCH && job_->doing_full_update_check_)
     request_->SetLoadFlags(request_->load_flags() | net::LOAD_BYPASS_CACHE);
   else if (existing_response_headers_.get())