Adds WmShell::RecordTaskSwitchMetric()

ash/wm/window_cycle_controller.cc

 // Copyright 2014 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/wm/window_cycle_controller.h"
 
+#include "ash/common/metrics/task_switch_source.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/window_cycle_event_filter.h"
 #include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/wm/window_cycle_list.h"
 #include "base/metrics/histogram.h"
 
 namespace ash {
 
@@ skipping 62 matching lines @@
   WmWindow* active_window_after_window_cycle = GetActiveWindow(
       WmShell::Get()->mru_window_tracker()->BuildMruWindowList());
 
   // Remove our key event filter.
   event_filter_.reset();
   UMA_HISTOGRAM_MEDIUM_TIMES("Ash.WindowCycleController.CycleTime",
                              base::Time::Now() - cycle_start_time_);
 
   if (active_window_after_window_cycle != nullptr &&
       active_window_before_window_cycle_ != active_window_after_window_cycle) {
-    Shell::GetInstance()
-        ->metrics()
-        ->task_switch_metrics_recorder()
-        .OnTaskSwitch(TaskSwitchMetricsRecorder::WINDOW_CYCLE_CONTROLLER);
+    WmShell::Get()->RecordTaskSwitchMetric(
+        TaskSwitchSource::WINDOW_CYCLE_CONTROLLER);
   }
   active_window_before_window_cycle_ = nullptr;
 }
 
 }  // namespace ash