Add metrics for when a cast is started or stopped from the system tray.

ash/metrics/user_metrics_recorder.cc

Index: ash/metrics/user_metrics_recorder.cc
diff --git a/ash/metrics/user_metrics_recorder.cc b/ash/metrics/user_metrics_recorder.cc
index cfc4d8ee16d4a79a28fe463ce86ff38e8f60b497..7cb885dda26fe24550895b96b8262a362198e8ea 100644
--- a/ash/metrics/user_metrics_recorder.cc
+++ b/ash/metrics/user_metrics_recorder.cc
@@ -358,6 +358,9 @@ void UserMetricsRecorder::RecordUserMetricsAction(UserMetricsAction action) {
       base::RecordAction(
           base::UserMetricsAction("StatusArea_CapsLock_Popup"));
       break;
+    case ash::UMA_STATUS_AREA_CAST_STOP_CAST:
+      base::RecordAction(base::UserMetricsAction("StatusArea_Cast_StopCast"));
+      break;
     case ash::UMA_STATUS_AREA_CONNECT_TO_CONFIGURED_NETWORK:
       base::RecordAction(
           base::UserMetricsAction("StatusArea_Network_ConnectConfigured"));
@@ -397,6 +400,10 @@ void UserMetricsRecorder::RecordUserMetricsAction(UserMetricsAction action) {
     case ash::UMA_STATUS_AREA_DETAILED_CAST_VIEW:
       base::RecordAction(base::UserMetricsAction("StatusArea_Cast_Detailed"));
       break;
+    case ash::UMA_STATUS_AREA_DETAILED_CAST_VIEW_LAUNCH_CAST:
+      base::RecordAction(
+          base::UserMetricsAction("StatusArea_Cast_Detailed_Launch_Cast"));
+      break;
     case ash::UMA_STATUS_AREA_DETAILED_DRIVE_VIEW:
       base::RecordAction(
           base::UserMetricsAction("StatusArea_Drive_Detailed"));