Update test expectations after Chromium r343910

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index 03dc529362e7be079a458f256dd7dcafbd5859db..f0ead6f8683bb0a459c72885c8b11466785ef717 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -28,6 +28,13 @@ crbug.com/463358 [ Mac Linux Debug ] fast/backgrounds/transformed-body-backgroun
 crbug.com/463358 [ Mac Linux Debug ] svg/W3C-SVG-1.1/paths-data-02-t.svg [ ImageOnlyFailure ]
 crbug.com/463358 [ Mac Linux Debug ] css3/masking/clip-path-polygon.html [ ImageOnlyFailure ]
 
+crbug.com/455939 http/tests/xmlhttprequest/methods-async.html [ NeedsRebaseline ]
+crbug.com/455939 http/tests/xmlhttprequest/methods.html [ NeedsRebaseline ]
+crbug.com/455939 http/tests/xmlhttprequest/workers/methods-async.html [ NeedsRebaseline ]
+crbug.com/455939 http/tests/xmlhttprequest/workers/methods.html [ NeedsRebaseline ]
+crbug.com/455939 http/tests/xmlhttprequest/workers/shared-worker-methods-async.html [ NeedsRebaseline ]
+crbug.com/455939 http/tests/xmlhttprequest/workers/shared-worker-methods.html [ NeedsRebaseline ]
+
 crbug.com/267206 [ Mac ] virtual/rootlayerscrolls/fast/scrolling/scrollbar-tickmarks-hittest.html [ Timeout ]
 
 crbug.com/474440 [ Mac Debug ] plugins/destroy-reentry.html [ Timeout ]