Create component to expose network usage stats to consumers.

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 57ca56c6cb450f5d23d1ba152b53892e47a2cc28..1087cbac244e757dae560b15e27612240b9f9ff8 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -1066,6 +1066,8 @@ void ProfileIOData::Init(
   network_delegate->set_enable_do_not_track(&enable_do_not_track_);
   network_delegate->set_force_google_safe_search(&force_google_safesearch_);
   network_delegate->set_force_youtube_safety_mode(&force_youtube_safety_mode_);
+  network_delegate->set_data_use_aggregator(
+      io_thread_globals->data_use_aggregator.get(), IsOffTheRecord());
 
   // NOTE: Proxy service uses the default io thread network delegate, not the
   // delegate just created.