system_request_context() has to be called on the UI thread.

chrome/browser/rlz/rlz.cc

Index: chrome/browser/rlz/rlz.cc
diff --git a/chrome/browser/rlz/rlz.cc b/chrome/browser/rlz/rlz.cc
index 5d9c8df7bc351fcf8856b452af7f30bb8a6bc2a0..fd6b1cd2b683e22ced435c3d96681a03600ac6d1 100644
--- a/chrome/browser/rlz/rlz.cc
+++ b/chrome/browser/rlz/rlz.cc
@@ -193,6 +193,7 @@ bool RLZTracker::Init(bool first_run, int delay, bool google_default_search,
   registrar_.Add(this, content::NOTIFICATION_NAV_ENTRY_PENDING,
                  content::NotificationService::AllSources());
 
+  rlz_lib::SetURLRequestContext(g_browser_process->system_request_context());
   ScheduleDelayedInit(delay);
 
   return true;
@@ -214,8 +215,6 @@ void RLZTracker::DelayedInit() {
 
   bool schedule_ping = false;
 
-  rlz_lib::SetURLRequestContext(g_browser_process->system_request_context());
-
   // For organic brandcodes do not use rlz at all. Empty brandcode usually
   // means a chromium install. This is ok.
   std::string brand;