Allow use of metrics url override outside of Chromecast

components/metrics/metrics_switches.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/metrics/metrics_switches.h"
 
 namespace metrics {
 namespace switches {
 
+// Override the URL to which metrics logs are sent for debugging.
+const char kOverrideMetricsUploadUrl[] = "override-metrics-upload-url";
+
 // Forces a reset of the one-time-randomized FieldTrials on this client, also
 // known as the Chrome Variations state.
 const char kResetVariationState[] = "reset-variation-state";
 
 }  // namespace switches
 }  // namespace metrics