cros: WallpaperController reparent based on session state

chrome/browser/chromeos/login/lock/screen_locker.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 "chrome/browser/chromeos/login/lock/screen_locker.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/shell.h"
-#include "ash/wallpaper/wallpaper_controller.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm/window_util.h"
 #include "ash/wm/wm_event.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 481 matching lines @@
 // ScreenLocker, private:
 
 ScreenLocker::~ScreenLocker() {
   VLOG(1) << "Destroying ScreenLocker " << this;
   DCHECK(base::MessageLoopForUI::IsCurrent());
 
   if (authenticator_.get())
     authenticator_->SetConsumer(NULL);
   ClearErrors();
 
-  VLOG(1) << "Moving wallpaper to unlocked container";
-  ash::Shell::Get()->wallpaper_controller()->MoveToUnlockedContainer();

[xiyuan, 2017/04/21 15:30:58]

Covered by session state change to ACTIVE in line 528.

-
   screen_locker_ = NULL;
   bool state = false;
   VLOG(1) << "Emitting SCREEN_LOCK_STATE_CHANGED with state=" << state;
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_SCREEN_LOCK_STATE_CHANGED,
       content::Source<ScreenLocker>(this),
       content::Details<bool>(&state));
 
   VLOG(1) << "Calling session manager's HandleLockScreenDismissed D-Bus method";
   DBusThreadManager::Get()->GetSessionManagerClient()->
@@ skipping 11 matching lines @@
   authenticator_ = authenticator;
 }
 
 void ScreenLocker::ScreenLockReady() {
   locked_ = true;
   base::TimeDelta delta = base::Time::Now() - start_time_;
   VLOG(1) << "ScreenLocker " << this << " is ready after "
           << delta.InSecondsF() << " second(s)";
   UMA_HISTOGRAM_TIMES("ScreenLocker.ScreenLockTime", delta);
 
-  VLOG(1) << "Moving wallpaper to locked container";
-  ash::Shell::Get()->wallpaper_controller()->MoveToLockedContainer();

[xiyuan, 2017/04/21 15:30:58]

Covered by session state change to LOCKED in line 559.

-
   bool state = true;
   VLOG(1) << "Emitting SCREEN_LOCK_STATE_CHANGED with state=" << state;
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_SCREEN_LOCK_STATE_CHANGED,
       content::Source<ScreenLocker>(this),
       content::Details<bool>(&state));
   VLOG(1) << "Calling session manager's HandleLockScreenShown D-Bus method";
   DBusThreadManager::Get()->GetSessionManagerClient()->NotifyLockScreenShown();
 
   session_manager::SessionManager::Get()->SetSessionState(
       session_manager::SessionState::LOCKED);
 
   input_method::InputMethodManager::Get()
       ->GetActiveIMEState()
       ->EnableLockScreenLayouts();
 }
 
 bool ScreenLocker::IsUserLoggedIn(const AccountId& account_id) const {
   for (user_manager::User* user : users_) {
     if (user->GetAccountId() == account_id)
       return true;
   }
   return false;
 }
 
 }  // namespace chromeos