Re-enable element-request-fullscreen-and-move-to-iframe-manual.html

It used to fail with site isolation but it no longer does.

R=foolip@chromium.org

Bug: 1007228
Change-Id: I69ba7539d8b08cad2185aecdb22df000df97bec4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2223080Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774245}

third_party/blink/web_tests/TestExpectations

@@ -102,7 +102,6 @@ crbug.com/895001 external/wpt/html/user-activation/message-event-activation-api-
 crbug.com/872952 http/tests/media/autoplay/webaudio-autoplay-iframe-with-gesture.html [ Timeout Pass ]
 crbug.com/949003 http/tests/printing/cross-site-frame-scrolled.html [ Pass Failure ]
 crbug.com/949003 http/tests/printing/cross-site-frame.html [ Pass Failure ]
-crbug.com/1007228 external/wpt/fullscreen/api/element-request-fullscreen-and-move-to-iframe-manual.html [ Pass Failure ]
 crbug.com/1007229 external/wpt/intersection-observer/same-origin-grand-child-iframe.sub.html [ Pass Failure ]
 # ====== Site Isolation failures until here ======