Update web-platform-tests to revision 589d1d54b73d37f1efde64f75cc408bdd640b44a

tests/wpt/web-platform-tests/docs/writing-tests/testdriver.md

@@ -65,6 +65,10 @@ setKeyboard: Set the current default key source
 addKeyboard: Add a new key input source with the given name
 ```
 
+This works with elements in other frames/windows as long as they are
+same-origin with the test, and the test does not depend on the
+window.name property remaining unset on the target window.
+
 ### bless
 
 Usage: `test_driver.bless(intent, action)`
@@ -104,6 +108,10 @@ possible to click it. It returns a promise that resolves after the
 click has occurred or rejects if the element cannot be clicked (for
 example, it is obscured by an element on top of it).
 
+This works with elements in other frames/windows as long as they are
+same-origin with the test, and the test does not depend on the
+window.name property remaining unset on the target window.
+
 Note that if the element to be clicked does not have a unique ID, the
 document must not have any DOM mutations made between the function
 being called and the promise settling.
@@ -120,6 +128,10 @@ make it possible to send keys. It returns a promise that resolves
 after the keys have been sent, or rejects if the keys cannot be sent
 to the element.
 
+This works with elements in other frames/windows as long as they are
+same-origin with the test, and the test does not depend on the
+window.name property remaining unset on the target window.
+
 Note that if the element that the keys need to be sent to does not have
 a unique ID, the document must not have any DOM mutations made
 between the function being called and the promise settling.