From 7cdf36bc7f72ca63f7471d0895c08bb620b99df7 Mon Sep 17 00:00:00 2001
From: gaaclarke <30870216+gaaclarke@users.noreply.github.com>
Date: Tue, 29 Oct 2019 16:09:14 -0700
Subject: [PATCH] Made it so we clean up gl resources when view controllers get
 deleted. (flutter/engine#13396)

---
 .../platform/darwin/ios/framework/Source/FlutterEngine.mm    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
index 2711e2e9b82..83551d2aed0 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
@@ -203,6 +203,11 @@ NSString* const FlutterDefaultDartEntrypoint = nil;
 - (void)notifyViewControllerDeallocated {
   if (!_allowHeadlessExecution) {
     [self destroyContext];
+  } else {
+    flutter::PlatformViewIOS* platform_view = [self iosPlatformView];
+    if (platform_view) {
+      platform_view->SetOwnerViewController({});
+    }
   }
   _viewController.reset();
 }