Disabled xrSession_requestAnimationFrame_getViewerPose.https.html.

xrSession_requestAnimationFrame_getViewerPose.https.html is flakey
and fails approximately 20% of the time.

Also, fixed bug number in prior line disabling oopif-storage.js.

TBR=tguilbert@chromium.org

Bug: 1056879
Change-Id: I18739671f245c98fed28a2bc0d2329ee08f9c0e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2080555
Commit-Queue: Chris Mumford <cmumford@google.com>
Reviewed-by: Chris Mumford <cmumford@google.com>
Cr-Commit-Position: refs/heads/master@{#745646}

third_party/blink/web_tests/TestExpectations

@@ -6707,5 +6707,5 @@ crbug.com/1056022 [ Fuchsia ] http/tests/eventsource/eventsource-bad-mime-type.h
 # Sheriff 2020-02-28
 crbug.com/1057036 [ Mac ] virtual/controls-refresh/calendar-picker/date-picker-ax.html [ Pass Timeout ]
 crbug.com/1057036 [ Mac ] virtual/controls-refresh/week-picker/week-picker-ax.html [ Pass Timeout ]
-#  https://crbug.com/1057138
-crbug.com/1055006 [ Linux Debug ] virtual/not-site-per-process/http/tests/devtools/oopif/oopif-storage.js [ Pass Timeout ]
+crbug.com/1057138 [ Linux Debug ] virtual/not-site-per-process/http/tests/devtools/oopif/oopif-storage.js [ Pass Timeout ]
+crbug.com/1056879 [ Win7 ] external/wpt/webxr/xrSession_requestAnimationFrame_getViewerPose.https.html [ Pass Failure Timeout ]