Widen expectations for editing/spelling/spellcheck-editable-on-focus.html

Now also timing out on Mac/Debug, and it's consistently timing out,
not flakily.

BUG=356957
TBR=mkwst@chromium.org

Review URL: https://codereview.chromium.org/476843004

git-svn-id: svn://svn.chromium.org/blink/trunk@180301 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -822,7 +822,7 @@ crbug.com/353790 [ Linux Win ] virtual/threaded/animations/import.html [ Pass Ti
 crbug.com/354785 [ Win Debug ] svg/as-background-image/animated-svg-animation-control.html [ ImageOnlyFailure ]
 crbug.com/354785 [ Linux Debug ] svg/as-background-image/animated-svg-animation-control.html [ ImageOnlyFailure Pass ]
 
-crbug.com/356957 [ Win Debug ] editing/spelling/spellcheck-editable-on-focus.html [ Pass Timeout ]
+crbug.com/356957 [ Win Mac Debug ] editing/spelling/spellcheck-editable-on-focus.html [ Timeout ]
 
 crbug.com/344238 [ Mac Win Debug ] virtual/deferred/inspector/timeline/timeline-window-filter.html [ Pass Timeout ]