Emit OnNativeWidgetDestroying() before clearing the NSWindowDelegate.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 7cd61ddd4eb9a1306c288538143a6db651c8b3bf..c94ecbab8d68cea0ec6a653bd79bff1430f92dab 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -2113,6 +2113,11 @@ test("browser_tests") {
           "../browser/ui/views/web_dialog_view_browsertest.cc",
         ]
       }
+      if (is_mac && mac_views_browser) {
+        sources += [
+          "../browser/ui/views/frame/browser_view_browsertest_mac.mm",
+        ]
+      }
     }
 
     if (is_linux && !is_component_build) {