Migrate simple ash Shell metrics users.

ash/wm/maximize_mode/maximize_mode_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/maximize_mode/maximize_mode_controller.h"
 
 #include <utility>
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
@@ skipping 90 matching lines @@
 
 MaximizeModeController::MaximizeModeController()
     : have_seen_accelerometer_data_(false),
       touchview_usage_interval_start_time_(base::Time::Now()),
       tick_clock_(new base::DefaultTickClock()),
 #if defined(OS_CHROMEOS)
       tablet_mode_switch_is_on_(false),
 #endif
       lid_is_closed_(false) {
   WmShell::Get()->AddShellObserver(this);
-  Shell* shell = Shell::GetInstance();
-  shell->metrics()->RecordUserMetricsAction(
-      ash::UMA_MAXIMIZE_MODE_INITIALLY_DISABLED);
+  WmShell::Get()->RecordUserMetricsAction(UMA_MAXIMIZE_MODE_INITIALLY_DISABLED);
 
 #if defined(OS_CHROMEOS)
   // TODO(jonross): Do not create MaximizeModeController if the flag is
   // unavailable. This will require refactoring
   // IsMaximizeModeWindowManagerEnabled to check for the existance of the
   // controller.
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kAshEnableTouchView)) {
     chromeos::AccelerometerReader::GetInstance()->AddObserver(this);
-    shell->window_tree_host_manager()->AddObserver(this);
+    Shell::GetInstance()->window_tree_host_manager()->AddObserver(this);
   }
   chromeos::DBusThreadManager::Get()->
       GetPowerManagerClient()->AddObserver(this);
 #endif  // OS_CHROMEOS
 }
 
 MaximizeModeController::~MaximizeModeController() {
   WmShell::Get()->RemoveShellObserver(this);
 #if defined(OS_CHROMEOS)
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
@@ skipping 27 matching lines @@
   bool is_enabled = !!maximize_mode_window_manager_.get();
   if (should_enable == is_enabled)
     return;
 
   Shell* shell = Shell::GetInstance();
 
   if (should_enable) {
     maximize_mode_window_manager_.reset(new MaximizeModeWindowManager());
     // TODO(jonross): Move the maximize mode notifications from ShellObserver
     // to MaximizeModeController::Observer
-    shell->metrics()->RecordUserMetricsAction(ash::UMA_MAXIMIZE_MODE_ENABLED);
+    WmShell::Get()->RecordUserMetricsAction(UMA_MAXIMIZE_MODE_ENABLED);
     shell->OnMaximizeModeStarted();
   } else {
     maximize_mode_window_manager_.reset();
-    shell->metrics()->RecordUserMetricsAction(ash::UMA_MAXIMIZE_MODE_DISABLED);
+    WmShell::Get()->RecordUserMetricsAction(UMA_MAXIMIZE_MODE_DISABLED);
     shell->OnMaximizeModeEnded();
   }
 }
 
 bool MaximizeModeController::IsMaximizeModeWindowManagerEnabled() const {
   return maximize_mode_window_manager_.get() != NULL;
 }
 
 void MaximizeModeController::AddWindow(aura::Window* window) {
   if (IsMaximizeModeWindowManagerEnabled())
@@ skipping 247 matching lines @@
   return elapsed_time.InSeconds() <= kLidRecentlyOpenedDurationSeconds;
 }
 
 void MaximizeModeController::SetTickClockForTest(
     std::unique_ptr<base::TickClock> tick_clock) {
   DCHECK(tick_clock_);
   tick_clock_ = std::move(tick_clock);
 }
 
 }  // namespace ash