network_time_tracker: add temporary time protocol.

ios/chrome/test/testing_application_context.mm

Index: ios/chrome/test/testing_application_context.mm
diff --git a/ios/chrome/test/testing_application_context.mm b/ios/chrome/test/testing_application_context.mm
index 0bf790e57221c1910459a876bbc9e6782098789e..50d3dd2cd3a9957d8e7d5a080c0b14957dff2181 100644
--- a/ios/chrome/test/testing_application_context.mm
+++ b/ios/chrome/test/testing_application_context.mm
@@ -10,6 +10,7 @@
 #include "base/time/default_tick_clock.h"
 #include "components/network_time/network_time_tracker.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
+#include "net/url_request/url_request_context_getter.h"
 
 TestingApplicationContext::TestingApplicationContext()
     : application_locale_("en"),
@@ -127,7 +128,8 @@ TestingApplicationContext::GetNetworkTimeTracker() {
     DCHECK(local_state_);
     network_time_tracker_.reset(new network_time::NetworkTimeTracker(
         base::WrapUnique(new base::DefaultClock),
-        base::WrapUnique(new base::DefaultTickClock), local_state_));
+        base::WrapUnique(new base::DefaultTickClock), local_state_,
+        GetSystemURLRequestContext()));
   }
   return network_time_tracker_.get();
 }