From b2f5ab6cd23cb15606195f9df0004ebbd2c003cb Mon Sep 17 00:00:00 2001
From: Marshall Greenblatt <magreenblatt@gmail.com>
Date: Mon, 31 Mar 2025 12:11:33 -0400
Subject: [PATCH] Fix crash on invalid chromeMediaSourceId (fixes #3911)

---
 libcef/browser/media_access_query.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libcef/browser/media_access_query.cc b/libcef/browser/media_access_query.cc
index 89d20fc55..f5eae2d93 100644
--- a/libcef/browser/media_access_query.cc
+++ b/libcef/browser/media_access_query.cc
@@ -215,8 +215,10 @@ class CefMediaAccessQuery {
             content::DesktopMediaID(content::DesktopMediaID::TYPE_SCREEN,
                                     -1 /* webrtc::kFullDesktopScreenId */);
       }
-      video_devices.emplace_back(request_.video_type, media_id.ToString(),
-                                 "Screen");
+      if (media_id.type != content::DesktopMediaID::TYPE_NONE) {
+        video_devices.emplace_back(request_.video_type, media_id.ToString(),
+                                   "Screen");
+      }
     }
 
     blink::mojom::StreamDevicesSetPtr stream_devices_set =