Added UMA statistics for changing the active window via click or touch events.

ash/metrics/user_metrics_recorder.h

 // 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.
 
 #ifndef ASH_METRICS_USER_METRICS_RECORDER_H_
 #define ASH_METRICS_USER_METRICS_RECORDER_H_
 
 #include "ash/ash_export.h"
 #include "ash/metrics/task_switch_metrics_recorder.h"
 #include "base/timer/timer.h"
@@ skipping 28 matching lines @@
   UMA_LAUNCHER_SWITCH_TASK,
   UMA_MAXIMIZE_MODE_DISABLED,
   UMA_MAXIMIZE_MODE_ENABLED,
   UMA_MAXIMIZE_MODE_INITIALLY_DISABLED,
   UMA_MOUSE_DOWN,
   UMA_PANEL_MINIMIZE_CAPTION_CLICK,
   UMA_PANEL_MINIMIZE_CAPTION_GESTURE,
   UMA_SHELF_ALIGNMENT_SET_BOTTOM,
   UMA_SHELF_ALIGNMENT_SET_LEFT,
   UMA_SHELF_ALIGNMENT_SET_RIGHT,
+  UMA_SCREEN_EVENT_SWITCH_TASK,
   UMA_STATUS_AREA_AUDIO_CURRENT_INPUT_DEVICE,
   UMA_STATUS_AREA_AUDIO_CURRENT_OUTPUT_DEVICE,
   UMA_STATUS_AREA_AUDIO_SWITCH_INPUT_DEVICE,
   UMA_STATUS_AREA_AUDIO_SWITCH_OUTPUT_DEVICE,
   UMA_STATUS_AREA_BRIGHTNESS_CHANGED,
   UMA_STATUS_AREA_BLUETOOTH_CONNECT_KNOWN_DEVICE,
   UMA_STATUS_AREA_BLUETOOTH_CONNECT_UNKNOWN_DEVICE,
   UMA_STATUS_AREA_BLUETOOTH_DISABLED,
   UMA_STATUS_AREA_BLUETOOTH_ENABLED,
   UMA_STATUS_AREA_CAPS_LOCK_DETAILED,
@@ skipping 119 matching lines @@
   base::RepeatingTimer<UserMetricsRecorder> timer_;
 
   TaskSwitchMetricsRecorder task_switch_metrics_recorder_;
 
   DISALLOW_COPY_AND_ASSIGN(UserMetricsRecorder);
 };
 
 }  // namespace ash
 
 #endif  // ASH_METRICS_USER_METRICS_RECORDER_H_