Default to new metrics service URL for non-Cast clients.

chromecast/browser/metrics/cast_metrics_service_client.cc

Index: chromecast/browser/metrics/cast_metrics_service_client.cc
diff --git a/chromecast/browser/metrics/cast_metrics_service_client.cc b/chromecast/browser/metrics/cast_metrics_service_client.cc
index c7ecddf670e850a2e7311764df63971ec04cc618..d769bf7bae95a9a5327a1a1313ae94331fbe2371 100644
--- a/chromecast/browser/metrics/cast_metrics_service_client.cc
+++ b/chromecast/browser/metrics/cast_metrics_service_client.cc
@@ -243,7 +243,9 @@ std::string CastMetricsServiceClient::GetMetricsServerUrl() {
     return command_line->GetSwitchValueASCII(
         switches::kOverrideMetricsUploadUrl);
   }
-  return ::metrics::MetricsServiceClient::GetMetricsServerUrl();
+  // Note: This uses the old metrics service URL because some server-side
+  // provisioning is needed to support the extra Cast traffic on the new URL.
+  return ::metrics::kOldMetricsServerUrl;
 }
 
 std::unique_ptr<::metrics::MetricsLogUploader>