Add lock pod animation on unlock.

ash/wm/session_state_controller_impl2.cc

Index: ash/wm/session_state_controller_impl2.cc
diff --git a/ash/wm/session_state_controller_impl2.cc b/ash/wm/session_state_controller_impl2.cc
index 5ba07eae590a8266bf651c12e7ddea36f82aa7a8..f239fd65f772a36d8e265dff83e8ade2fc88229f 100644
--- a/ash/wm/session_state_controller_impl2.cc
+++ b/ash/wm/session_state_controller_impl2.cc
@@ -9,6 +9,7 @@
 #include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/session_state_animator.h"
+#include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/shared/compound_event_filter.h"
@@ -175,10 +176,13 @@ void SessionStateControllerImpl2::CancelShutdownAnimation() {
     return;
   }
   animator_->CreateForeground();
-  animator_->StartAnimation(
+  base::Callback<void(void)> callback =
+      base::Bind(&internal::SessionStateAnimator::DropForeground,
+      base::Unretained(animator_.get()));
+  animator_->StartAnimationWithCallback(
       internal::SessionStateAnimator::LOCK_SCREEN_SYSTEM_FOREGROUND,
-      internal::SessionStateAnimator::ANIMATION_UNDO_PARTIAL_FADE_IN);
-
+      internal::SessionStateAnimator::ANIMATION_UNDO_PARTIAL_FADE_IN,
+      callback);
   pre_shutdown_timer_.Stop();
 }
 
@@ -288,4 +292,12 @@ void SessionStateControllerImpl2::OnRealShutdownTimeout() {
   delegate_->RequestShutdown();
 }
 
+void SessionStateControllerImpl2::OnLockScreenHide(
+  base::Callback<void(void)>& callback) {
+  animator_->StartAnimationWithCallback(
+      internal::SessionStateAnimator::LOCK_SCREEN_CONTAINERS,
+      internal::SessionStateAnimator::ANIMATION_RAISE,
+      callback);
+}
+
 }  // namespace ash