[Offline Pages] Allow BackgroundLoader to track network bytes using prerenderer hook-in.

chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
diff --git a/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
index 893828fc193c2b52f6216f75797e34c6eea70248..cd12a2c395076fbf964d450827dd8d4dbbfd50fa 100644
--- a/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/loader/chrome_resource_dispatcher_host_delegate.cc
@@ -107,6 +107,7 @@
 
 #if defined(OS_ANDROID)
 #include "chrome/browser/android/download/intercept_download_resource_throttle.h"
+#include "chrome/browser/android/offline_pages/background_loader_offliner.h"
 #include "chrome/browser/android/offline_pages/downloads/resource_throttle.h"
 #include "chrome/browser/loader/data_reduction_proxy_resource_throttle_android.h"
 #include "components/navigation_interception/intercept_navigation_delegate.h"
@@ -176,6 +177,12 @@ void UpdatePrerenderNetworkBytesCallback(content::WebContents* web_contents,
       GetPrerenderManager(web_contents);
   if (prerender_manager)
     prerender_manager->AddProfileNetworkBytesIfEnabled(bytes);
+
+  offline_pages::BackgroundLoaderOffliner* background_loader =
+      offline_pages::BackgroundLoaderOffliner::FromWebContents(web_contents);
+
+  if (background_loader)
+    background_loader->OnNetworkBytesChanged(bytes);
 }
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)