Remove X-Chrome-Exponential-Throttling header

net/url_request/url_request_throttler_simulation_unittest.cc

Index: net/url_request/url_request_throttler_simulation_unittest.cc
diff --git a/net/url_request/url_request_throttler_simulation_unittest.cc b/net/url_request/url_request_throttler_simulation_unittest.cc
index 80734ae29cc66582f587ea6b18fd86ffdca3e8d6..da6afe1741d64927f7fe45e5695daea75a95222e 100644
--- a/net/url_request/url_request_throttler_simulation_unittest.cc
+++ b/net/url_request/url_request_throttler_simulation_unittest.cc
@@ -427,8 +427,7 @@ class Requester : public DiscreteTimeSimulation::Actor {
               server_->mock_request(),
               server_->context().network_delegate())) {
         int status_code = server_->HandleRequest();
-        MockURLRequestThrottlerHeaderAdapter response_headers(status_code);
-        throttler_entry_->UpdateWithResponse(std::string(), &response_headers);
+        throttler_entry_->UpdateWithResponse(status_code);
 
         if (status_code == 200) {
           if (results_)