Mark external/wpt/html/semantics/tabular-data/processing-model-1/span-limits.html as slow on Debug

TBR=qyearsley@chromium.org

Bug: 626703
Change-Id: I4313b889c98e9fc98165273dd701cde3c8003c81
Reviewed-on: https://chromium-review.googlesource.com/602233Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#492016}

third_party/WebKit/LayoutTests/SlowTests

@@ -421,3 +421,5 @@ crbug.com/748418 virtual/mojo-loading/http/tests/streams/chromium/simple-queue-f
 crbug.com/748418 virtual/mojo-loading/http/tests/streams/chromium/simple-queue-full-node-shift.html [ Slow ]
 crbug.com/748418 virtual/mojo-loading/http/tests/streams/chromium/simple-queue-many-foreach.html [ Slow ]
 crbug.com/748418 virtual/mojo-loading/http/tests/streams/chromium/simple-queue-push-shift-peek.html [ Slow ]
+
+crbug.com/626703 [ Debug ] external/wpt/html/nemantics/tabular-data/processing-model-1/span-limits.html [ Slow ]

third_party/WebKit/LayoutTests/TestExpectations

@@ -3019,8 +3019,6 @@ crbug.com/745079 external/wpt/geolocation-API/PositionOptions.https.html [ Failu
 crbug.com/708994 http/tests/security/cross-frame-mouse-source-capabilities.html [ Timeout Pass ]
 crbug.com/708994 virtual/mojo-loading/http/tests/security/cross-frame-mouse-source-capabilities.html [ Timeout Pass ]
 
-crbug.com/626703 [ Win7 ] external/wpt/html/semantics/tabular-data/processing-model-1/span-limits.html [ Timeout ]
-
 crbug.com/745887 [ Mac Win ] fast/frames/sandboxed-iframe-plugins.html [ Failure Pass ]
 crbug.com/745899 [ Linux ] vr/getFrameData_samewithinframe.html [ Failure Pass ]