[cobalt] Switch cobalt_config -> metrics_registry

Test: No functional changes
Change-Id: I15c0e8d453d2c487f753deabcd066e8edc6c8357
diff --git a/logger/BUILD.gn b/logger/BUILD.gn
index 6e4e3c0..3d95392 100644
--- a/logger/BUILD.gn
+++ b/logger/BUILD.gn
@@ -2,9 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//third_party/cobalt_config/cobalt_config.gni")
+import("//third_party/cobalt_config/metrics_registry.gni")
 
-cobalt_config("internal_metrics_config") {
+metrics_registry("internal_metrics_config") {
   use_target_name = true
 
   customer_id = 2147483647