[ash-md] Makes Ctrl+W accelerator close a selected window in overview mode

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 137199a08e16c2fc12c938a58620d7122d4706ed..2e0940aa99befff89abcda5554ccbde07f3aaf08 100644
--- a/ash/metrics/user_metrics_recorder.cc
+++ b/ash/metrics/user_metrics_recorder.cc
@@ -587,6 +587,14 @@ void UserMetricsRecorder::RecordUserMetricsAction(UserMetricsAction action) {
       base::RecordAction(
           base::UserMetricsAction("WindowSelector_OverviewEnterKey"));
       break;
+    case UMA_WINDOW_OVERVIEW_CLOSE_BUTTON:
+      base::RecordAction(
+          base::UserMetricsAction("WindowSelector_OverviewCloseButton"));
+      break;
+    case UMA_WINDOW_OVERVIEW_CLOSE_KEY:
+      base::RecordAction(
+          base::UserMetricsAction("WindowSelector_OverviewCloseKey"));
+      break;
   }
 }