Update webusb/, webvtt/, webxr/, and xhr/ from monorail results

See #798 for the methodology.

webusb/META.yml

@@ -1,6 +1,10 @@
 links:
-  - product: chrome
-    url: https://bugs.chromium.org/p/chromium/issues/detail?id=839117
-    results:
-    - test:  usb.serviceworker.https.html
-      status: FAIL
+- product: chrome
+  url: https://bugs.chromium.org/p/chromium/issues/detail?id=839117
+  results:
+  - test: usb.serviceworker.https.html
+    status: FAIL
+- product: chrome
+  url: https://crbug.com/166689
+  results:
+  - test: idlharness.https.any.worker.html

webvtt/rendering/cues-with-video/processing-model/META.yml

@@ -1,5 +1,9 @@
 links:
 - product: firefox
+  url: https://bugzilla.mozilla.org/show_bug.cgi?id=1463844
   results:
   - test: audio_has_no_subtitles.html
-  url: https://bugzilla.mozilla.org/show_bug.cgi?id=1463844
+- product: chrome
+  url: https://crbug.com/1012242
+  results:
+  - test: basic.html

webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/META.yml

@@ -0,0 +1,5 @@
+links:
+- product: chrome
+  url: https://crbug.com/466072
+  results:
+  - test: id_color.html

webxr/dom-overlay/META.yml

@@ -0,0 +1,5 @@
+links:
+- product: chrome
+  url: https://crbug.com/1101193
+  results:
+  - test: nested_fullscreen.https.html

xhr/META.yml

@@ -3,7 +3,7 @@ links:
   url: https://crbug.com/571722
   results:
   - test: setrequestheader-header-allowed.htm
-    subtest: "XMLHttpRequest: setRequestHeader() - headers that are allowed (User-Agent)"
+    subtest: 'XMLHttpRequest: setRequestHeader() - headers that are allowed (User-Agent)'
 - product: webkitgtk
   url: https://bugs.webkit.org/show_bug.cgi?id=209801
   results:
@@ -53,3 +53,7 @@ links:
   results:
   - test: response-json.htm
     status: FAIL
+- product: chrome
+  url: https://crbug.com/881180
+  results:
+  - test: open-url-multi-window-4.htm