Update variations and metrics server URLs.
Changes variations URL to the new URL universally and puts
the new metrics URL behind a base::Feature so that it could
be rolled out more broadly via variations server.
BUG=703835
Review-Url: https://codereview.chromium.org/2829133002
Cr-Commit-Position: refs/heads/master@{#466649}
diff --git a/components/metrics/url_constants.h b/components/metrics/url_constants.h
index b52ddef..cb1ba6b 100644
--- a/components/metrics/url_constants.h
+++ b/components/metrics/url_constants.h
@@ -7,8 +7,11 @@
namespace metrics {
-// The default metrics server's URL.
-extern const char kDefaultMetricsServerUrl[];
+// The new metrics server's URL.
+extern const char kNewMetricsServerUrl[];
+
+// The old metrics server's URL.
+extern const char kOldMetricsServerUrl[];
// The default MIME type for the uploaded metrics data.
extern const char kDefaultMetricsMimeType[];
