Remove unneeded ScopedLayerAnimationSettings::LockTransitionDuration()

ui/views/corewm/window_animations.h

Index: ui/views/corewm/window_animations.h
diff --git a/ui/views/corewm/window_animations.h b/ui/views/corewm/window_animations.h
index 996c215dc89b0a4856d14f3704eaef83cac40174..4a0a30b10ed877ae47558b7be82aab79baf0a7d4 100644
--- a/ui/views/corewm/window_animations.h
+++ b/ui/views/corewm/window_animations.h
@@ -70,10 +70,28 @@ VIEWS_EXPORT bool HasWindowVisibilityAnimationTransition(
     aura::Window* window,
     WindowVisibilityAnimationTransition transition);
 
-VIEWS_EXPORT void SetWindowVisibilityAnimationDuration(
+// Sets the duration of |window|'s show animation.
+VIEWS_EXPORT void SetWindowShowAnimationDuration(
     aura::Window* window,
     const base::TimeDelta& duration);
 
+// Sets the duration of |window|'s hide animation.
+VIEWS_EXPORT void SetWindowHideAnimationDuration(
+    aura::Window* window,
+    const base::TimeDelta& duration);
+
+// Returns the duration of |window|'s show animation if it is set and
+// |default_duration| otherwise.
+VIEWS_EXPORT base::TimeDelta GetWindowShowAnimationDuration(
+    aura::Window* window,
+    const base::TimeDelta& default_duration);
+
+// Returns the duration of |window|'s hide animation duration if it is set and
+// |default_duration| otherwise.
+VIEWS_EXPORT base::TimeDelta GetWindowHideAnimationDuration(
+    aura::Window* window,
+    const base::TimeDelta& default_duration);
+
 VIEWS_EXPORT void SetWindowVisibilityAnimationVerticalPosition(
     aura::Window* window,
     float position);