Triage a couple of XHR issues against open bugs.

User-Agent isn't currently allowed to be set. Mark the TestExceptations
against it.

BUG=571722

Change-Id: I66e23de22c0cbf4e47c64a2b1f3b0adae9f5d886
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132969Reviewed-by: Robert Ma <robertma@chromium.org>
Commit-Queue: Robert Ma <robertma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755528}

third_party/blink/web_tests/TestExpectations

@@ -4007,10 +4007,6 @@ crbug.com/626703 external/wpt/webvtt/rendering/cues-with-video/processing-model/
 crbug.com/626703 external/wpt/webvtt/rendering/cues-with-video/processing-model/too_many_cues.html [ Failure ]
 crbug.com/626703 external/wpt/webvtt/rendering/cues-with-video/processing-model/too_many_cues_wrapped.html [ Failure ]
 crbug.com/626703 virtual/omt-worker-fetch/external/wpt/xhr/event-readystatechange-loaded.htm [ Failure Timeout ]
-crbug.com/626703 external/wpt/xhr/preserve-ua-header-on-redirect.htm [ Failure ]
-crbug.com/626703 virtual/omt-worker-fetch/external/wpt/xhr/preserve-ua-header-on-redirect.htm [ Failure ]
-crbug.com/626703 external/wpt/xhr/setrequestheader-header-allowed.htm [ Failure ]
-crbug.com/626703 virtual/omt-worker-fetch/external/wpt/xhr/setrequestheader-header-allowed.htm [ Failure ]
 crbug.com/626703 [ Win10 ] external/wpt/preload/delaying-onload-link-preload-after-discovery.html [ Timeout ]
 crbug.com/626703 [ Win ] external/wpt/css/css-writing-modes/box-offsets-rel-pos-vlr-005.xht [ Failure ]
 crbug.com/626703 [ Win ] external/wpt/css/css-writing-modes/box-offsets-rel-pos-vrl-004.xht [ Failure ]
@@ -4633,6 +4629,10 @@ crbug.com/852645 external/wpt/fullscreen/api/element-request-fullscreen-two-ifra
 crbug.com/985520 virtual/focusless-spat-nav/fast/spatial-navigation/focusless/snav-focusless-enter-from-interest-a11y.html [ Crash ]
 crbug.com/985520 virtual/focusless-spat-nav/fast/spatial-navigation/focusless/snav-focusless-enter-from-interest.html [ Crash ]
 
+# User-Agent is not able to be set on XHR/fetch
+crbug.com/571722 external/wpt/xhr/preserve-ua-header-on-redirect.htm [ Failure ]
+crbug.com/571722 virtual/omt-worker-fetch/external/wpt/xhr/preserve-ua-header-on-redirect.htm [ Failure ]
+
 # Sheriff failures 2017-02-21
 crbug.com/73609 http/tests/media/video-play-stall.html [ Pass Timeout ]
 crbug.com/73609 virtual/audio-service/http/tests/media/video-play-stall.html [ Pass Timeout ]

third_party/blink/web_tests/external/wpt/xhr/setrequestheader-header-allowed-expected.txt

+This is a testharness.js-based test.
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (Authorization)
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (Pragma)
+FAIL XMLHttpRequest: setRequestHeader() - headers that are allowed (User-Agent) assert_equals: expected "User-Agent," but got ""
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (Content-Transfer-Encoding)
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (Content-Type)
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (Overwrite)
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (If)
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (Status-URI)
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (X-Pink-Unicorn)
+PASS XMLHttpRequest: setRequestHeader() - headers that are allowed (!#$%&'*+-.^_`|~0123456789abcdefghijklmnopqrstuvwxyz)
+Harness: the test ran to completion.
+