Plumb network stack information about existence of cached copy

content/child/resource_dispatcher.cc

Index: content/child/resource_dispatcher.cc
diff --git a/content/child/resource_dispatcher.cc b/content/child/resource_dispatcher.cc
index 3da70c331b6dd391c79474f018086bc7ac75bbbd..1c4351df496a8844dd3e1f7114b7f44aca17fe00 100644
--- a/content/child/resource_dispatcher.cc
+++ b/content/child/resource_dispatcher.cc
@@ -521,6 +521,7 @@ void ResourceDispatcher::OnRequestComplete(
     int request_id,
     int error_code,
     bool was_ignored_by_handler,
+    bool stale_copy_in_cache,
     const std::string& security_info,
     const base::TimeTicks& browser_completion_time) {
   TRACE_EVENT0("loader", "ResourceDispatcher::OnRequestComplete");
@@ -548,7 +549,8 @@ void ResourceDispatcher::OnRequestComplete(
   // The request ID will be removed from our pending list in the destructor.
   // Normally, dispatching this message causes the reference-counted request to
   // die immediately.
-  peer->OnCompletedRequest(error_code, was_ignored_by_handler, security_info,
+  peer->OnCompletedRequest(error_code, was_ignored_by_handler,
+                           stale_copy_in_cache, security_info,
                            renderer_completion_time);
 }