mash: Migrate SessionStateDelegate access to WmShell.

ash/wm/power_button_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/wm/power_button_controller.h"
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shell_window_ids.h"
+#include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/wm/session_state_animator.h"
 #include "base/command_line.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/display/types/display_snapshot.h"
 #include "ui/events/event_handler.h"
 #include "ui/wm/core/compound_event_filter.h"
 
@@ skipping 44 matching lines @@
   // while the screen is off (http://crbug.com/128451), unless an external
   // display is still on (http://crosbug.com/p/24912).
   if (brightness_is_zero_ && !internal_display_off_and_external_display_on_)
     return;
 
   if (volume_down_pressed_ && down &&
       Shell::GetInstance()
           ->maximize_mode_controller()
           ->IsMaximizeModeWindowManagerEnabled()) {
     Shell::GetInstance()->accelerator_controller()->PerformActionIfEnabled(
-        ash::TAKE_SCREENSHOT);
+        TAKE_SCREENSHOT);
     return;
   }
 
   const SessionStateDelegate* session_state_delegate =
-      Shell::GetInstance()->session_state_delegate();
+      WmShell::Get()->GetSessionStateDelegate();
   if (has_legacy_power_button_) {
     // If power button releases won't get reported correctly because we're not
     // running on official hardware, just lock the screen or shut down
     // immediately.
     if (down) {
       if (session_state_delegate->CanLockScreen() &&
           !session_state_delegate->IsUserSessionBlocked() &&
           !controller_->LockRequested()) {
         controller_->StartLockAnimationAndLockImmediately(false);
       } else {
@@ skipping 26 matching lines @@
     }
   }
 }
 
 void PowerButtonController::OnLockButtonEvent(
     bool down,
     const base::TimeTicks& timestamp) {
   lock_button_down_ = down;
 
   const SessionStateDelegate* session_state_delegate =
-      Shell::GetInstance()->session_state_delegate();
+      WmShell::Get()->GetSessionStateDelegate();
   if (!session_state_delegate->CanLockScreen() ||
       session_state_delegate->IsScreenLocked() ||
       controller_->LockRequested() || controller_->ShutdownRequested()) {
     return;
   }
 
   // Give the power button precedence over the lock button.
   if (power_button_down_)
     return;
 
@@ skipping 20 matching lines @@
     } else if (display->current_mode()) {
       external_display_on = true;
     }
   }
   internal_display_off_and_external_display_on_ =
       internal_display_off && external_display_on;
 }
 #endif
 
 }  // namespace ash