Reenable feature policy control over fullscreen

third_party/WebKit/LayoutTests/external/wpt_automation/fullscreen/auto-click.js

Index: third_party/WebKit/LayoutTests/external/wpt_automation/fullscreen/auto-click.js
diff --git a/third_party/WebKit/LayoutTests/external/wpt_automation/fullscreen/auto-click.js b/third_party/WebKit/LayoutTests/external/wpt_automation/fullscreen/auto-click.js
index 334b23af3012e93e0c28458a3d8d2b65f6cb732e..651f2260e858505a9c6a4b02ac0850bd8c3ed50d 100644
--- a/third_party/WebKit/LayoutTests/external/wpt_automation/fullscreen/auto-click.js
+++ b/third_party/WebKit/LayoutTests/external/wpt_automation/fullscreen/auto-click.js
@@ -44,10 +44,17 @@ for (const button of document.getElementsByTagName('button')) {
   click(button);
 }
 for (const iframe of document.getElementsByTagName('iframe')) {
-  observe(iframe.contentDocument);
-  iframe.addEventListener('load', () => {
+  try {
     observe(iframe.contentDocument);
-  });
+    iframe.addEventListener('load', () => {
+      observe(iframe.contentDocument);
+    });
+  } catch (e) {
+    // Skip cross-origin iframes, but report other errors
+    if (e.name != "SecurityError") {
+        throw e;
+    }
+  }
 }
 
 // Observe future changes.