Set a "metrics_client_id" crash key instead of "guid" on Mac OS X

chrome/browser/metrics/chrome_metrics_service_client.cc

Index: chrome/browser/metrics/chrome_metrics_service_client.cc
diff --git a/chrome/browser/metrics/chrome_metrics_service_client.cc b/chrome/browser/metrics/chrome_metrics_service_client.cc
index 6aa71c8233d83c39f11217f8f3cbf356cb27f17d..3e3d51590972e1b7c6fb089a661bd67ec3cdc485 100644
--- a/chrome/browser/metrics/chrome_metrics_service_client.cc
+++ b/chrome/browser/metrics/chrome_metrics_service_client.cc
@@ -180,7 +180,11 @@ void ChromeMetricsServiceClient::RegisterPrefs(PrefRegistrySimple* registry) {
 
 void ChromeMetricsServiceClient::SetMetricsClientId(
     const std::string& client_id) {
-  crash_keys::SetCrashClientIdFromGUID(client_id);
+  crash_keys::SetMetricsClientIdFromGUID(client_id);
+}
+
+void ChromeMetricsServiceClient::OnRecordingDisabled() {
+  crash_keys::ClearMetricsClientId();
 }
 
 bool ChromeMetricsServiceClient::IsOffTheRecordSessionActive() {