Fix black background when locking with fullscreen window:

ash/wm/session_state_animator.h

 // 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.
 
 #ifndef ASH_WM_SESSION_STATE_ANIMATOR_H_
 #define ASH_WM_SESSION_STATE_ANIMATOR_H_
 
 #include "ash/ash_export.h"
 #include "ash/wm/workspace/colored_window_controller.h"
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
 #include "ui/aura/window.h"
+#include "ui/compositor/layer_animation_observer.h"
 
 namespace gfx {
 class Rect;
 class Size;
 }
 
 namespace ui {
 class Layer;
 }
 
 namespace ash {
 namespace internal {
 
 // Displays onscreen animations for session state changes (lock/unlock, sign
 // out, shut down).
 class ASH_EXPORT SessionStateAnimator {
  public:
   // Animations that can be applied to groups of containers.
   enum AnimationType {
     ANIMATION_PARTIAL_CLOSE = 0,
     ANIMATION_UNDO_PARTIAL_CLOSE,
     ANIMATION_FULL_CLOSE,
     ANIMATION_FADE_IN,
+    ANIMATION_FADE_OUT,
     ANIMATION_HIDE_IMMEDIATELY,
     ANIMATION_RESTORE,
     // Animations that raise/lower windows to/from area "in front" of the
     // screen.
     ANIMATION_LIFT,
+    ANIMATION_UNDO_LIFT,
     ANIMATION_DROP,
     // Animations that raise/lower windows from/to area "behind" of the screen.
     ANIMATION_RAISE_TO_SCREEN,
     ANIMATION_LOWER_BELOW_SCREEN,
     ANIMATION_PARTIAL_FADE_IN,
     ANIMATION_UNDO_PARTIAL_FADE_IN,
     ANIMATION_FULL_FADE_IN,
     ANIMATION_GRAYSCALE_BRIGHTNESS,
     ANIMATION_UNDO_GRAYSCALE_BRIGHTNESS,
   };
@@ skipping 38 matching lines @@
     // user session windows are hidden and lock UI is shown on top of it.
     // This layer is included in shutdown animation.
     LOCK_SCREEN_BACKGROUND = 1 << 3,
 
     // Lock screen and lock screen modal containers.
     LOCK_SCREEN_CONTAINERS = 1 << 4,
 
     // Multiple system layers belong here like status, menu, tooltip
     // and overlay layers.
     LOCK_SCREEN_RELATED_CONTAINERS = 1 << 5,
-
-    LOCK_SCREEN_SYSTEM_FOREGROUND = 1 << 6,
   };
 
   // Helper class used by tests to access internal state.
   class ASH_EXPORT TestApi {
    public:
     explicit TestApi(SessionStateAnimator* animator)
         : animator_(animator) {}
 
     // Returns true if containers of a given |container_mask|
     // were last animated with |type| (probably; the analysis is fairly ad-hoc).
@@ skipping 40 matching lines @@
                       AnimationSpeed speed);
 
   // Apply animation |type| to all containers included in |container_mask| with
   // specified |speed| and call a |callback| at the end of the animation, if it
   // is not null.
   void StartAnimationWithCallback(int container_mask,
                                   AnimationType type,
                                   AnimationSpeed speed,
                                   base::Callback<void(void)>& callback);
 
+// Apply animation |type| to all containers included in |container_mask| with

[Daniel Erat, 2012/12/13 21:47:33]

nit: indent this comment two more spaces

+// specified |speed| and add |observer| to all animations.
+  void StartAnimationWithObserver(int container_mask,
+                                  AnimationType type,
+                                  AnimationSpeed speed,
+                                  ui::LayerAnimationObserver* observer);
+
   // Applies animation |type| whith specified |speed| to the root container.
   void StartGlobalAnimation(AnimationType type,
                             AnimationSpeed speed);
 
   // Apply animation |type| to window |window| with |speed| and add |observer|
   // if it is not NULL to the last animation sequence.
   void RunAnimationForWindow(aura::Window* window,
                              AnimationType type,
                              AnimationSpeed speed,
                              ui::LayerAnimationObserver* observer);
 
   // White foreground that is used during shutdown animation to "fade
   // everything into white".
   scoped_ptr<ColoredWindowController> foreground_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionStateAnimator);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_SESSION_STATE_ANIMATOR_H_