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

ash/metrics/user_metrics_recorder.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/metrics/user_metrics_recorder.h"
 
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/shelf/shelf_model.h"
 #include "ash/common/shell_window_ids.h"
@@ skipping 569 matching lines @@
     case UMA_WINDOW_OVERVIEW_ACTIVE_WINDOW_CHANGED:
       base::RecordAction(
           base::UserMetricsAction("WindowSelector_ActiveWindowChanged"));
       task_switch_metrics_recorder_.OnTaskSwitch(
           TaskSwitchMetricsRecorder::OVERVIEW_MODE);
       break;
     case UMA_WINDOW_OVERVIEW_ENTER_KEY:
       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;
   }
 }
 
 void UserMetricsRecorder::OnShellInitialized() {
   // Lazy creation of the DesktopTaskSwitchMetricRecorder because it accesses
   // Shell::GetInstance() which is not available when |this| is instantiated.
   if (!desktop_task_switch_metric_recorder_) {
     desktop_task_switch_metric_recorder_.reset(
         new DesktopTaskSwitchMetricRecorder());
   }
@@ skipping 36 matching lines @@
   return IsUserActive() && !IsKioskModeActive();
 }
 
 void UserMetricsRecorder::StartTimer() {
   timer_.Start(FROM_HERE,
                base::TimeDelta::FromSeconds(kAshPeriodicMetricsTimeInSeconds),
                this, &UserMetricsRecorder::RecordPeriodicMetrics);
 }
 
 }  // namespace ash