Bug 1924859 - [bidi] Only allow "browsingContext.traverseHistory" command for top-level browsing contexts. r=webdriver-reviewers,jdescottes

Differential Revision: https://phabricator.services.mozilla.com/D227215

remote/webdriver-bidi/modules/root/browsingContext.sys.mjs

@@ -1495,6 +1495,12 @@ class BrowsingContextModule extends RootBiDiModule {
 
     const context = this.#getBrowsingContext(contextId);
 
+    if (context.parent) {
+      throw new lazy.error.InvalidArgumentError(
+        `Browsing Context with id ${contextId} is not top-level`
+      );
+    }
+
     lazy.assert.integer(
       delta,
       lazy.pprint`Expected "delta" to be an integer, got ${delta}`

testing/web-platform/meta/webdriver/tests/bidi/browsing_context/traverse_history/invalid.py.ini

@@ -1,5 +1,3 @@
 [invalid.py]
   disabled:
     if (os == "android") and not fission: bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1865124
-  [test_iframe]
-    expected: FAIL