Move data use measurement to DataUseNetworkDelegate

chrome/browser/io_thread.h

Index: chrome/browser/io_thread.h
diff --git a/chrome/browser/io_thread.h b/chrome/browser/io_thread.h
index b5a2a9def93e80f18abf90160f4cb8201049ad0d..134a87f6ff7e233edb376d5ba3bcfb1475894b48 100644
--- a/chrome/browser/io_thread.h
+++ b/chrome/browser/io_thread.h
@@ -24,6 +24,7 @@
 #include "build/build_config.h"
 #include "chrome/browser/net/chrome_network_delegate.h"
 #include "chrome/common/features.h"
+#include "components/metrics/data_use_tracker.h"
 #include "components/prefs/pref_member.h"
 #include "components/ssl_config/ssl_config_service_manager.h"
 #include "content/public/browser/browser_thread.h"
@@ -399,7 +400,7 @@ class IOThread : public content::BrowserThreadDelegate {
   const base::TimeTicks creation_time_;
 
   // Callback for updating data use prefs which needs to be initialized on UI
-  // thread and passed to |ChromeNetworkDelegate|.
+  // thread and passed to |DataUseNetworkDelegate|.
   metrics::UpdateUsagePrefCallbackType metrics_data_use_forwarder_;
 
   base::WeakPtrFactory<IOThread> weak_factory_;