From 5c2488134e79136d93e068b727806907ebddf056 Mon Sep 17 00:00:00 2001
From: Chavi Weingarten <chaviw@google.com>
Date: Fri, 17 Jul 2020 17:54:55 +0000
Subject: [PATCH] Revert "Call preserveSurfaces when detaching children."

This reverts commit 9118c9b573a743a1526beb7a0de48174ee561af2.

Reason for revert: b/161316231

Bug: 161316231
Test: Steps from bug
Change-Id: Ieb76c99d96eb7f261a1bd2680ebf83905c2a5369
---
 .../java/com/android/server/wm/WindowStateAnimator.java     | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/services/core/java/com/android/server/wm/WindowStateAnimator.java b/services/core/java/com/android/server/wm/WindowStateAnimator.java
index 508d2d477067f..da45300ed3180 100644
--- a/services/core/java/com/android/server/wm/WindowStateAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowStateAnimator.java
@@ -1592,12 +1592,6 @@ class WindowStateAnimator {
         if (mSurfaceController != null) {
             mSurfaceController.detachChildren();
         }
-        // If the children are detached, it means the app is exiting. We don't want to tear the
-        // content down too early, otherwise we could end up with a flicker. By preserving the
-        // current surface, we ensure the content remains on screen until the window is completely
-        // removed. It also ensures that the old surface is cleaned up when started again since it
-        // forces mSurfaceController to be set to null.
-        preserveSurfaceLocked();
     }
 
     void setOffsetPositionForStackResize(boolean offsetPositionForStackResize) {