Add lock pod animation on unlock.

chrome/browser/chromeos/login/screen_locker.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 "chrome/browser/chromeos/login/screen_locker.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
+#include "ash/wm/session_state_controller.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/timer.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/login/authenticator.h"
@@ skipping 277 matching lines @@
 void ScreenLocker::Hide() {
   DCHECK(MessageLoop::current()->type() == MessageLoop::TYPE_UI);
   // For a guest/demo user, screen_locker_ would have never been initialized.
   if (UserManager::Get()->IsLoggedInAsGuest() ||
       UserManager::Get()->IsLoggedInAsDemoUser()) {
     VLOG(1) << "Refusing to hide lock screen for guest/demo account";
     return;
   }
 
   DCHECK(screen_locker_);
+  base::Callback<void(void)> callback =
+      base::Bind(&ScreenLocker::ScheduleDeletion);
+  ash::Shell::GetInstance()->session_state_controller()->
+    OnLockScreenHide(callback);
+}
+
+void ScreenLocker::ScheduleDeletion() {
+  // Avoid possible multiple calls.
+  if (NULL == screen_locker_)

[Daniel Erat, 2012/10/25 15:45:58]

nit: use "screen_locker_ != NULL" instead (it's easier to read and is
overwhelmingly more common in chrome -- the compiler should warn on assignment
in conditionals)

+    return;
   VLOG(1) << "Posting task to delete ScreenLocker " << screen_locker_;
-  MessageLoopForUI::current()->DeleteSoon(FROM_HERE, screen_locker_);
+  ScreenLocker* screen_locker = screen_locker_;
+  screen_locker_ = NULL;
+  MessageLoopForUI::current()->DeleteSoon(FROM_HERE, screen_locker);
 }
 
 // static
 void ScreenLocker::InitClass() {
   g_screen_lock_observer.Get();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ScreenLocker, private:
 
@@ skipping 37 matching lines @@
   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();
 }
 
 }  // namespace chromeos