Implement offline mode behind a flag

content/browser/loader/resource_request_info_impl.cc

Index: content/browser/loader/resource_request_info_impl.cc
diff --git a/content/browser/loader/resource_request_info_impl.cc b/content/browser/loader/resource_request_info_impl.cc
index 8039a12262164e6881e70767ec032f6a4e49891f..09b82cab1ce036d3d782339991c50b374adcb471 100644
--- a/content/browser/loader/resource_request_info_impl.cc
+++ b/content/browser/loader/resource_request_info_impl.cc
@@ -4,6 +4,7 @@
 
 #include "content/browser/loader/resource_request_info_impl.h"
 
+#include "content/browser/loader/global_routing_id.h"
 #include "content/browser/worker_host/worker_service_impl.h"
 #include "content/common/net/url_request_user_data.h"
 #include "content/public/browser/global_request_id.h"
@@ -221,6 +222,10 @@ GlobalRequestID ResourceRequestInfoImpl::GetGlobalRequestID() const {
   return GlobalRequestID(child_id_, request_id_);
 }
 
+GlobalRoutingID ResourceRequestInfoImpl::GetGlobalRoutingID() const {
+  return GlobalRoutingID(child_id_, route_id_);
+}
+
 void ResourceRequestInfoImpl::set_requested_blob_data(
     webkit_blob::BlobData* data) {
   requested_blob_data_ = data;