Moves Shell::maximize_mode_controller() to WmShell

ash/system/chromeos/rotation/tray_rotation_lock.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/system/chromeos/rotation/tray_rotation_lock.h"
 
 #include "ash/common/system/tray/tray_item_more.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/display/screen_orientation_controller_chromeos.h"
@@ skipping 27 matching lines @@
 
  private:
   void UpdateImage();
 
   DISALLOW_COPY_AND_ASSIGN(RotationLockDefaultView);
 };
 
 RotationLockDefaultView::RotationLockDefaultView(SystemTrayItem* owner)
     : TrayItemMore(owner, false) {
   UpdateImage();
-  SetVisible(Shell::GetInstance()
+  SetVisible(WmShell::Get()
                  ->maximize_mode_controller()
                  ->IsMaximizeModeWindowManagerEnabled());
   WmShell::Get()->AddShellObserver(this);
 }
 
 RotationLockDefaultView::~RotationLockDefaultView() {
   WmShell::Get()->RemoveShellObserver(this);
 }
 
 bool RotationLockDefaultView::PerformAction(const ui::Event& event) {
@@ skipping 74 matching lines @@
   StopObservingShell();
   TrayImageItem::DestroyTrayView();
 }
 
 bool TrayRotationLock::GetInitialVisibility() {
   return ShouldBeVisible();
 }
 
 bool TrayRotationLock::ShouldBeVisible() {
   return OnPrimaryDisplay() &&
-         Shell::GetInstance()
+         WmShell::Get()
              ->maximize_mode_controller()
              ->IsMaximizeModeWindowManagerEnabled() &&
          Shell::GetInstance()
              ->screen_orientation_controller()
              ->rotation_locked();
 }
 
 bool TrayRotationLock::OnPrimaryDisplay() const {
   gfx::NativeView native_view = system_tray()->GetWidget()->GetNativeView();
   display::Display parent_display =
@@ skipping 12 matching lines @@
 }
 
 void TrayRotationLock::StopObservingShell() {
   if (!observing_shell_)
     return;
   WmShell::Get()->RemoveShellObserver(this);
   observing_shell_ = false;
 }
 
 }  // namespace ash