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

ash/common/metrics/task_switch_source.h

Index: ash/common/metrics/task_switch_source.h
diff --git a/ash/common/metrics/task_switch_source.h b/ash/common/metrics/task_switch_source.h
index c67653fbdb9c2fb27028505b90d0a6dff58b572e..6b1bf0e1f1b255450c1362110594f3b891372d4e 100644
--- a/ash/common/metrics/task_switch_source.h
+++ b/ash/common/metrics/task_switch_source.h
@@ -13,8 +13,6 @@ 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,
@@ -23,8 +21,6 @@ enum class TaskSwitchSource {
   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
 };