Adding a navigation policy for the "presentation" feature in window.open()

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 5a414bae9abb526fe0e730a0456c35baa50a1dca..288bcf9a9e0ce68d413943dfafefe6dcf8662d00 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -4809,8 +4809,14 @@ void Document::didRemoveTouchEventHandler(Node* handler)
 {
     if (!m_touchEventTargets.get())
         return;
-    ASSERT(m_touchEventTargets->contains(handler));
+
+    // ASSERT(m_touchEventTargets->contains(handler));
+    // For demo purposes - let's soften this a bit to avoid assertion failure
+    // crashes. Seems that on closing the window this is prone to races on Windows.
+    if (!m_touchEventTargets->contains(handler))
+        return;
     m_touchEventTargets->remove(handler);
+
     if (Document* parent = parentDocument()) {
         parent->didRemoveTouchEventHandler(this);
         return;