[Windows Sandbox] MITIGATION_EXTENSION_POINT_DISABLE emergency off finch.

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index 7d523d826933f34cfab1b88dac61c0864242661a..b7e53d11d67d5eb7b948d1b73478a7200b4e4295 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -84,4 +84,11 @@ const base::Feature kSeccompSandboxAndroid{"SeccompSandboxAndroid",
                                            base::FEATURE_DISABLED_BY_DEFAULT};
 #endif
 
+#if defined(OS_WIN)
+// Emergency "off switch" for new Windows sandbox security mitigation,
+// sandbox::MITIGATION_EXTENSION_POINT_DISABLE.
+const base::Feature kWinSboxDisableExtensionPoints{
+    "WinSboxDisableExtensionPoint", base::FEATURE_ENABLED_BY_DEFAULT};
+#endif
+
 }  // namespace features