Removed Ash.AppList.TimeBetweenTaskSwitches and Ash.Tab.TimeBetweenSwitchToExistingTabUserActions h…

ash/common/metrics/task_switch_source.h

 // Copyright 2016 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_COMMON_METRICS_TASK_SWITCH_SOURCE_H_
 #define ASH_COMMON_METRICS_TASK_SWITCH_SOURCE_H_
 
 namespace ash {
 
 // Enumeration of the different user interfaces that could be the source of
 // a task switch. Note this is not necessarily comprehensive of all sources.
 enum class TaskSwitchSource {
   // Task switches caused by any two sources in this enum. NOTE: This value
   // should NOT be used outside of TaskSwitchMetricsRecorder.
   ANY,
-  // Task switches from selecting items in the app list.
-  APP_LIST,

[sky, 2016/10/03 19:11:51]

Are these values written to a histogram?

[bruthig, 2016/10/04 14:17:09]

No, they are used to look up a histogram name.

   // Task switches caused by the user activating a task window by clicking or
   // tapping on it.
   DESKTOP,
   // Task switches caused by selecting a window from overview mode which is
   // different from the previously-active window.
   OVERVIEW_MODE,
   // All task switches caused by shelf buttons, not including sub-menus.
   SHELF,
-  // All task switches caused by the tab strip.
-  TAB_STRIP,
   // Task switches caused by the WindowCycleController (ie Alt+Tab).
   WINDOW_CYCLE_CONTROLLER
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_METRICS_TASK_SWITCH_SOURCE_H_