Decouple workspace animation from other actions on windows (e.g. hide/show), so that animations can…

ash/wm/session_state_animator.h

Index: ash/wm/session_state_animator.h
diff --git a/ash/wm/session_state_animator.h b/ash/wm/session_state_animator.h
index ed6ea4509a5c287e47f3fd29bd867f2262f4b8da..751017312be86ee7e4e893e0ae1a4450601af4a2 100644
--- a/ash/wm/session_state_animator.h
+++ b/ash/wm/session_state_animator.h
@@ -68,6 +68,8 @@ class ASH_EXPORT SessionStateAnimator {
     ANIMATION_SPEED_SHOW_LOCK_SCREEN,
     // Speed for workspace-like animations in "new" animation set.
     ANIMATION_SPEED_MOVE_WINDOWS,
+    // Speed for undoing workspace-like animations in "new" animation set.
+    ANIMATION_SPEED_UNDO_MOVE_WINDOWS,
     // Speed for shutdown in "new" animation set.
     ANIMATION_SPEED_SHUTDOWN,
     // Speed for reverting shutdown in "new" animation set.