Migrate simple ash Shell metrics users.

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/session/session_state_delegate.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm_shell.h"
-#include "ash/metrics/user_metrics_recorder.h"
 #include "ash/shell.h"
 #include "ash/wm/window_cycle_list.h"
 #include "base/metrics/histogram.h"
 #include "ui/events/event.h"
 #include "ui/events/event_handler.h"
 
 namespace ash {
 
 namespace {
 
@@ skipping 43 matching lines @@
 // WindowCycleController, public:
 
 WindowCycleController::WindowCycleController() {
 }
 
 WindowCycleController::~WindowCycleController() {
 }
 
 // static
 bool WindowCycleController::CanCycle() {
-  // Don't allow window cycling if the screen is locked or a modal dialog is
-  // open.
-  return !Shell::GetInstance()->session_state_delegate()->IsScreenLocked() &&
-         !WmShell::Get()->IsSystemModalWindowOpen() &&
-         !WmShell::Get()->IsPinned();
+  // Prevent window cycling if the screen is locked or a modal dialog is open.
+  WmShell* wm_shell = WmShell::Get();
+  return !wm_shell->GetSessionStateDelegate()->IsScreenLocked() &&
+         !wm_shell->IsSystemModalWindowOpen() && !wm_shell->IsPinned();
 }
 
 void WindowCycleController::HandleCycleWindow(Direction direction) {
   if (!CanCycle())
     return;
 
   if (!IsCycling())
     StartCycling();
 
   Step(direction);
 }
 
 void WindowCycleController::StartCycling() {
   MruWindowTracker::WindowList window_list =
       Shell::GetInstance()->mru_window_tracker()->BuildMruWindowList();
 
   active_window_before_window_cycle_ = GetActiveWindow(window_list);
 
   window_cycle_list_.reset(new WindowCycleList(window_list));
   event_handler_.reset(new WindowCycleEventFilter());
   cycle_start_time_ = base::Time::Now();
-  Shell::GetInstance()->metrics()->RecordUserMetricsAction(UMA_WINDOW_CYCLE);
+  WmShell::Get()->RecordUserMetricsAction(UMA_WINDOW_CYCLE);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 // WindowCycleController, private:
 
 void WindowCycleController::Step(Direction direction) {
   DCHECK(window_cycle_list_.get());
   window_cycle_list_->Step(direction);
 }
 
@@ skipping 12 matching lines @@
       active_window_before_window_cycle_ != active_window_after_window_cycle) {
     Shell::GetInstance()
         ->metrics()
         ->task_switch_metrics_recorder()
         .OnTaskSwitch(TaskSwitchMetricsRecorder::WINDOW_CYCLE_CONTROLLER);
   }
   active_window_before_window_cycle_ = nullptr;
 }
 
 }  // namespace ash