Improve inter-document focus handling (#36649)

*Describe the changes that this pull request makes here. This will be
the commit message.*
rewritten the PR #28571
Implement
[Window#focus](https://html.spec.whatwg.org/multipage/#dom-window-focus),
[Window#blur](https://html.spec.whatwg.org/multipage/#dom-window-blur)
Testing: WPT
Fixes: #8981 #9421

---------

Signed-off-by: kongbai1996 <1782765876@qq.com>
Co-authored-by: yvt <i@yvt.jp>

tests/wpt/meta/html/browsers/origin/cross-origin-objects/cross-origin-objects-function-caching.html.ini

@@ -1,7 +1,4 @@
 [cross-origin-objects-function-caching.html]
-  [Cross-origin Window methods are cached]
-    expected: FAIL
-
   [Cross-origin Location `replace` method is cached]
     expected: FAIL
 

tests/wpt/meta/html/browsers/the-window-object/focus.window.js.ini

@@ -1,3 +0,0 @@
-[focus.window.html]
-  [focus]
-    expected: FAIL

tests/wpt/meta/html/browsers/the-window-object/security-window/window-security.https.html.ini

@@ -328,9 +328,3 @@
 
   [A SecurityError exception must be thrown when window.stop is accessed from a different origin.]
     expected: FAIL
-
-  [A SecurityError exception should not be thrown when window.blur is accessed from a different origin.]
-    expected: FAIL
-
-  [A SecurityError exception should not be thrown when window.focus is accessed from a different origin.]
-    expected: FAIL

tests/wpt/meta/html/browsers/the-window-object/window-properties.https.html.ini

@@ -1,9 +1,4 @@
 [window-properties.https.html]
-  [Window method: focus]
-    expected: FAIL
-
-  [Window method: blur]
-    expected: FAIL
 
   [Window method: print]
     expected: FAIL