Retrieve client_id from GoogleUpdateSettings when its missing from Local State.

components/metrics/client_info.cc

Index: components/metrics/client_info.cc
diff --git a/components/keyed_service/core/keyed_service.cc b/components/metrics/client_info.cc
similarity index 50%
copy from components/keyed_service/core/keyed_service.cc
copy to components/metrics/client_info.cc
index 5cfd61d3366268d6b02d83266bc6e396a1de8274..e96d78cd4b7caddaafc81875dafb7d6f20b04de8 100644
--- a/components/keyed_service/core/keyed_service.cc
+++ b/components/metrics/client_info.cc
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "components/keyed_service/core/keyed_service.h"
+#include "components/metrics/client_info.h"
 
-KeyedService::KeyedService() {}
+namespace metrics {
 
-KeyedService::~KeyedService() {}
+ClientInfo::ClientInfo() : installation_date(0), reporting_enabled_date(0) {}
 
-void KeyedService::Shutdown() {}
+}  // namespace metrics