Consistently use LoFi for an entire page

content/browser/loader/resource_loader.cc

Index: content/browser/loader/resource_loader.cc
diff --git a/content/browser/loader/resource_loader.cc b/content/browser/loader/resource_loader.cc
index d397a06bc0dafd199ef934bbd32255da384523d5..354851ea4f507c043e9ea16310e0b5f1fa01bf1d 100644
--- a/content/browser/loader/resource_loader.cc
+++ b/content/browser/loader/resource_loader.cc
@@ -28,6 +28,7 @@
 #include "content/public/browser/signed_certificate_timestamp_store.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/data_reduction_proxy_lofi_user_data.h"
 #include "content/public/common/process_type.h"
 #include "content/public/common/resource_response.h"
 #include "content/public/common/security_style.h"
@@ -94,6 +95,10 @@ void PopulateResourceResponse(ResourceRequestInfoImpl* info,
   response->head.was_fetched_via_proxy = request->was_fetched_via_proxy();
   response->head.proxy_server = response_info.proxy_server;
   response->head.socket_address = request->GetSocketAddress();
+  response->head.is_lofi =
+      static_cast<content::DataReductionProxyLoFiUserData*>(
+          request->GetUserData(DataReductionProxyLoFiUserData::kUserDataKey))
+          ->lofi_state() == LOFI_ON;
   if (ServiceWorkerRequestHandler* handler =
           ServiceWorkerRequestHandler::GetHandler(request)) {
     handler->GetExtraResponseInfo(&response->head);