Mark simplecall-no-ssrcs.https.html as failure on Mac

TBR=hbos@chromium.org,hta@chromium.org

Bug: 901711
Change-Id: I4ed1826e728cc777924ce4ab54050308db0bff31
Reviewed-on: https://chromium-review.googlesource.com/c/1316977Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Commit-Queue: Kunihiko Sakamoto <ksakamoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605246}

third_party/WebKit/LayoutTests/TestExpectations

@@ -3001,8 +3001,7 @@ crbug.com/893480 external/wpt/infrastructure/testdriver/actions/eventOrder.html
 crbug.com/893480 external/wpt/infrastructure/testdriver/actions/multiDevice.html [ Failure ]
 
 # ====== New tests from wpt-importer added here ======
-crbug.com/626703 [ Mac10.10 Mac10.13 Retina ] virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/simplecall-no-ssrcs.https.html [ Timeout ]
-crbug.com/626703 [ Mac10.12 ] virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/simplecall-no-ssrcs.https.html [ Failure Timeout ]
+crbug.com/626703 [ Mac10.10 Mac10.12 Mac10.13 Retina ] virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/simplecall-no-ssrcs.https.html [ Failure Timeout ]
 crbug.com/626703 external/wpt/css/css-text/letter-spacing/letter-spacing-bidi-002.html [ Failure ]
 crbug.com/626703 external/wpt/css/css-text/letter-spacing/letter-spacing-nesting-002.html [ Failure ]
 crbug.com/626703 [ Win ] external/wpt/css/css-text/word-break/word-break-keep-all-005.html [ Failure ]