Moves WindowSelectorController onto WmShell

ash/accelerators/accelerator_controller.cc

 // Copyright (c) 2012 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/accelerators/accelerator_controller.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 #include <utility>
@@ skipping 491 matching lines @@
 }
 
 void HandleToggleFullscreen(const ui::Accelerator& accelerator) {
   if (accelerator.key_code() == ui::VKEY_MEDIA_LAUNCH_APP2)
     base::RecordAction(UserMetricsAction("Accel_Fullscreen_F4"));
   accelerators::ToggleFullscreen();
 }
 
 void HandleToggleOverview() {
   base::RecordAction(base::UserMetricsAction("Accel_Overview_F5"));
-  Shell::GetInstance()->window_selector_controller()->ToggleOverview();
+  WmShell::Get()->window_selector_controller()->ToggleOverview();
 }
 
 bool CanHandleWindowSnapOrDock() {
   wm::WindowState* window_state = wm::GetActiveWindowState();
   // Disable window snapping shortcut key for full screen window due to
   // http://crbug.com/135487.
   return (window_state && window_state->IsUserPositionable() &&
           !window_state->IsFullscreen());
 }
 
@@ skipping 938 matching lines @@
 }
 
 void AcceleratorController::SetKeyboardBrightnessControlDelegate(
     std::unique_ptr<KeyboardBrightnessControlDelegate>
         keyboard_brightness_control_delegate) {
   keyboard_brightness_control_delegate_ =
       std::move(keyboard_brightness_control_delegate);
 }
 
 }  // namespace ash